Issue#2862: Fixes warnings on GH actions (#2866)

Co-authored-by: Deep <[email protected]>

Author: DeepC004

.github/workflows/docs.yml

@@ -14,13 +14,13 @@ jobs:
     if: (github.ref == 'refs/heads/master' && github.event_name == 'push') || github.event_name == 'release'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions/setup-python@v4
         with:
           python-version: 3.8
 
       - run: sudo npm install katex -g
-      - uses: actions/cache@v2
+      - uses: actions/cache@v3
         with:
           path: ~/.cache/pip
           key: pip-${{ hashFiles('requirements-dev.txt') }}-${{ hashFiles('docs/requirements.txt') }}