Change checkout and setup-python... (#5)

...to `master` version.

Author: Panquesito7

.github/workflows/cpplint.yml

@@ -7,7 +7,7 @@ jobs:
   cpplint:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v1
-    - uses: actions/setup-python@v1
+    - uses: actions/checkout@v2
+    - uses: actions/setup-python@v2
     - run: pip install cpplint
     - run: cpplint --recursive .

.github/workflows/cpplint_modified_files.yml

@@ -11,8 +11,8 @@ jobs:
   cpplint_modified_files:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v1
-      - uses: actions/setup-python@v1
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
       - shell: python  # Show the version of shell: python and then upgrade shell: python to Python 3.8
         run: import sys ; print("Python {}.{}.{}".format(*sys.version_info))  # Legacy Python :-(
       - run: sudo update-alternatives --install /usr/bin/python python ${pythonLocation}/bin/python3.8 10