ci: convert deprecated output commands to file-based successor

Author: aliziel

.github/workflows/release.yml

@@ -13,10 +13,10 @@ jobs:
             - uses: actions/checkout@v2
             - name: Get tag version
               id: tag_name
-              run: echo ::set-output name=SOURCE_TAG::${GITHUB_REF#refs/tags/}
+              run: echo "SOURCE_TAG=${GITHUB_REF#refs/tags/}" >> $GITHUB_OUTPUT
             - name: Get repo name
               id: repo_name
-              run: echo ::set-output name=REPOSITORY_NAME::$(echo "$GITHUB_REPOSITORY" | sed -e "s/:refs//")
+              run: echo "REPOSITORY_NAME=$(echo "$GITHUB_REPOSITORY" | sed -e "s/:refs//")" >> $GITHUB_OUTPUT
             - name: Build a release
               run: |
                bash create_release.sh $SOURCE_TAG