Remove deprecated set-output in GitHub workflow for release

Completely removing the intermediate step calculating the tag_name as
GitHub Actions is now providing this value in the context directly.
See https://github.com/orgs/community/discussions/26686 and
https://docs.github.com/en/actions/learn-github-actions/contexts#github-context

part of com-pas#307

Signed-off-by: Aurélien Pupier <apupier@redhat.com>

.github/workflows/release-project.yml

@@ -30,12 +30,6 @@ jobs:
           key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
           restore-keys: ${{ runner.os }}-m2
 
-      - name: Extract tag name
-        id: extract_tagname
-        shell: bash
-        # Extract the tag name from the git reference, value of GITHUB_REF will be something like refs/tags/<tag_name>.
-        run: echo "##[set-output name=tagname;]$(echo ${GITHUB_REF##*/})"
-
       - name: Set up JDK 17
         uses: actions/setup-java@v3
         with:
@@ -56,7 +50,7 @@ jobs:
           output_file: custom_maven_settings.xml
           servers: '[{ "id": "github-packages-compas", "username": "OWNER", "password": "${{ secrets.GITHUB_TOKEN }}" }]'
       - name: Set version with Maven
-        run: ./mvnw -B versions:set -DprocessAllModules=true -DnewVersion=${{ steps.extract_tagname.outputs.tagname }}
+        run: ./mvnw -B versions:set -DprocessAllModules=true -DnewVersion=${{ github.ref_name }}
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       - name: Deploy with Maven to GitHub Packages and Docker Hub