Update actions/checkout, replace set-output

Update actions/checkout to v3 (v2 uses node 12 which is deprecated), replace set-output with $GITHUB_OUTPUT (set-output is being deprecated)

.github/workflows/ci.yaml

@@ -8,7 +8,7 @@ jobs:
     runs-on: windows-2019
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           fetch-depth: 0
 
@@ -67,7 +67,7 @@ jobs:
       - name: Generate release tag
         id: tag
         run: |
-          echo "::set-output name=release_tag::UserBuild_$(date +"%Y.%m.%d_%H-%M")"
+          echo "release_tag=UserBuild_$(date +"%Y.%m.%d_%H-%M")" >> $GITHUB_OUTPUT
           
       - name: Release
         uses: softprops/action-gh-release@v1