Replace set-output with echo to $GITHUB_OUTPUT

The set-output method is deprecated in favor of echoing to
$GITHUB_OUTPUT for security reasons.

Author: cwbaker

.github/workflows/create-release.yml

@@ -1,6 +1,6 @@
 name: Create Release
 
-on: 
+on:
   workflow_dispatch:
 
 jobs:
@@ -17,7 +17,7 @@ jobs:
         version=`cat version.txt`.$commits
         last_release_tag=`git describe --tags --match "v*.*.*" --abbrev=0`
         git log --pretty=format:"- %s" $last_release_tag..HEAD >release_notes.txt
-        echo "::set-output name=version::${version}"
+        echo "version=${version}" >> $GITHUB_OUTPUT
       shell: bash
     - name: Create Release
       uses: actions/create-release@v1

.github/workflows/upload-to-github-release.yml

@@ -20,7 +20,7 @@ jobs:
         if [[ "$RUNNER_OS" == "Linux" ]]; then bash ./bootstrap-linux.bash ; fi
         if [[ "$RUNNER_OS" == "macOS" ]]; then bash ./bootstrap-macos.bash ; fi
         if [[ "$RUNNER_OS" == "Windows" ]]; then ./bootstrap-windows.bat ; fi
-        bootstrap/bin/forge variant=release      
+        bootstrap/bin/forge variant=release
         release/bin/forge variant=shipping prefix=shipping/forge install
       shell: bash
     - name: Test
@@ -34,7 +34,7 @@ jobs:
         pushd shipping
         tar -zcvf ${ARCHIVE} forge/bin/* forge/lua/**
         popd
-        echo "::set-output name=filename::${ARCHIVE}"
+        echo "filename=${ARCHIVE}" >> $GITHUB_OUTPUT
       shell: bash
     - name: Upload
       uses: actions/upload-release-asset@v1