Migrate set-output to $GITHUB_OUTPUT

https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

Author: znz

.github/workflows/build.yml

@@ -26,7 +26,7 @@ jobs:
         else
           tag=$(basename "${{ github.ref }}")
         fi
-        echo "::set-output name=tag::$tag"
+        echo "tag=$tag" >> $GITHUB_OUTPUT
     - name: Create Release
       id: create_release
       uses: actions/create-release@v1
@@ -55,7 +55,7 @@ jobs:
         platform=${{ matrix.os }}
         platform=${platform/macos-*/macos-latest}
         platform=${platform/windows-*/windows-latest}
-        echo "::set-output name=platform::$platform"
+        echo "platform=$platform" >> $GITHUB_OUTPUT
 
     # Build
     - uses: actions/checkout@v2