github: Direct users to discussions instead of issues for questions

Author: Veykril

src/tools/rust-analyzer/.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,4 @@
+contact_links:
+  - name: Questions regarding rust-analyzer
+    url: https://github.com/rust-lang/rust-analyzer/discussions
+    about: Please ask and answer questions here instead of opening an issue

src/tools/rust-analyzer/.github/ISSUE_TEMPLATE/critical_nightly_regression.md

@@ -12,5 +12,3 @@ Troubleshooting guide: https://rust-analyzer.github.io/book/troubleshooting.html
 
 Please try to provide information which will help us to fix the issue faster. Minimal reproducible examples with few dependencies are especially lovely <3.
 -->
-
-This is a serious regression in nightly and it's important to fix it before the next release.