Update Github Action workflow versions

The currently used versions use deprecated features and Node 12 which is EOL. Switch to newer versions as adviced.

https://github.blog/changelog/2022-09-22-github-actions-all-actions-will-begin-running-on-node16-instead-of-node12/ https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

.github/workflows/ci.yml

@@ -43,7 +43,7 @@ jobs:
       DEPENDENCIES_FOLDER: dependencies
       DEPENDENCIES_ROOT: ${{ github.workspace }}/dependencies
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           submodules: recursive
           path: metamod-source
@@ -53,7 +53,7 @@ jobs:
         run: echo 'SDKS=["episode1","tf2","l4d2","csgo","dota","insurgency"]' >> $GITHUB_ENV
 
       - name: Cache dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v3
         env:
           cache-name: hl2sdk
         with:
@@ -62,7 +62,7 @@ jobs:
           restore-keys: ${{ runner.os }}-build-${{ env.cache-name }}-
 
       # Setup Python for AMBuild
-      - uses: actions/setup-python@v2
+      - uses: actions/setup-python@v4
         name: Setup Python 3.8
         with:
           python-version: 3.8