[Markdown link check] Ignore network issue for GHE (#20)

Author: Henry Peteet

README.md

@@ -64,11 +64,12 @@ under active development and may be unstable. A few helpful guidelines:
 - The `com.unity.ml-agents` package is [verified](https://docs.unity3d.com/2020.1/Documentation/Manual/pack-safe.html)
   for Unity 2020.1 and later. Verified packages releases are numbered 1.0.x.
 
-| **Version** | **Release Date** | **Source** | **Documentation** | **Download** | **Python Package** | **Unity Package** |
-|:-------:|:------:|:-------------:|:-------:|:------------:|:------------:|:------------:|
-| **main (unstable)** | -- | [source](https://github.com/Unity-Technologies/ml-agents/tree/main) | [docs](https://github.com/Unity-Technologies/ml-agents/tree/main/docs/Readme.md) | [download](https://github.com/Unity-Technologies/ml-agents/archive/main.zip) | -- | -- |
-| **Release 19** | **January 14, 2022** | **[source](https://github.com/Unity-Technologies/ml-agents/tree/release_19)** | **[docs](https://github.com/Unity-Technologies/ml-agents/tree/release_19_docs/docs/Readme.md)** | **[download](https://github.com/Unity-Technologies/ml-agents/archive/release_19.zip)** | **[0.28.0](https://pypi.org/project/mlagents/0.28.0/)** | **[2.2.1](https://docs.unity3d.com/Packages/com.unity.ml-agents@2.2/manual/index.html)** |
-| **Verified Package 1.0.8** | **May 26, 2021** | **[source](https://github.com/Unity-Technologies/ml-agents/tree/com.unity.ml-agents_1.0.8)** | **[docs](https://github.com/Unity-Technologies/ml-agents/blob/release_2_verified_docs/docs/Readme.md)** | **[download](https://github.com/Unity-Technologies/ml-agents/archive/com.unity.ml-agents_1.0.8.zip)** | **[0.16.1](https://pypi.org/project/mlagents/0.16.1/)** | **[1.0.8](https://docs.unity3d.com/Packages/com.unity.ml-agents@1.0/manual/index.html)** |
+|        **Version**         |   **Release Date**   |                                          **Source**                                          |                                            **Documentation**                                            |                                             **Download**                                              |                   **Python Package**                    |                                    **Unity Package**                                     |
+|:--------------------------:|:--------------------:|:--------------------------------------------------------------------------------------------:|:-------------------------------------------------------------------------------------------------------:|:-----------------------------------------------------------------------------------------------------:|:-------------------------------------------------------:|:----------------------------------------------------------------------------------------:|
+|    **main (unstable)**     |          --          |             [source](https://github.com/Unity-Technologies/ml-agents/tree/main)              |            [docs](https://github.com/Unity-Technologies/ml-agents/tree/main/docs/Readme.md)             |             [download](https://github.com/Unity-Technologies/ml-agents/archive/main.zip)              |                           --                            |                                            --                                            |
+|       **Release 19**       | **January 14, 2022** |        **[source](https://github.com/Unity-Technologies/ml-agents/tree/release_19)**         |     **[docs](https://github.com/Unity-Technologies/ml-agents/tree/release_19_docs/docs/Readme.md)**     |        **[download](https://github.com/Unity-Technologies/ml-agents/archive/release_19.zip)**         | **[0.28.0](https://pypi.org/project/mlagents/0.28.0/)** |                                            --                                            |
+|       **Release 18**       |  **June 09, 2021**   |        **[source](https://github.com/Unity-Technologies/ml-agents/tree/release_18)**         |     **[docs](https://github.com/Unity-Technologies/ml-agents/tree/release_18_docs/docs/Readme.md)**     |        **[download](https://github.com/Unity-Technologies/ml-agents/archive/release_18.zip)**         | **[0.27.0](https://pypi.org/project/mlagents/0.27.0/)** | **[2.1.0](https://docs.unity3d.com/Packages/com.unity.ml-agents@2.1/manual/index.html)** |
+| **Verified Package 1.0.8** |   **May 26, 2021**   | **[source](https://github.com/Unity-Technologies/ml-agents/tree/com.unity.ml-agents_1.0.8)** | **[docs](https://github.com/Unity-Technologies/ml-agents/blob/release_2_verified_docs/docs/Readme.md)** | **[download](https://github.com/Unity-Technologies/ml-agents/archive/com.unity.ml-agents_1.0.8.zip)** | **[0.16.1](https://pypi.org/project/mlagents/0.16.1/)** | **[1.0.8](https://docs.unity3d.com/Packages/com.unity.ml-agents@1.0/manual/index.html)** |
 
 If you are a researcher interested in a discussion of Unity as an AI platform,
 see a pre-print of our

markdown-link-check.full.json

@@ -19,6 +19,10 @@
         {
             "pattern": "mailto:",
             "comment": "mailto checking broken"
+        },
+        {
+            "pattern": "https://www.researchgate.net/",
+            "comment": "Issue with GHE certs / firewall"
         }
     ]
 }