chore(ci): update Maven command to extract project version using help:evaluate for accuracy

Author: SteKoe

.github/workflows/build-main.yml

@@ -60,7 +60,7 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Extract Maven project version
-        run: echo "version=$(./mvnw -q -Dexec.executable=echo -Dexec.args='${project.version}' --non-recursive exec:exec)" >> "$GITHUB_OUTPUT"
+        run: echo "version=$(./mvnw help:evaluate -Dexpression=project.version -q -DforceStdout)" >> "$GITHUB_OUTPUT"
         id: project
 
       - name: Show extracted Maven project version