chore: update workflow scripts

Author: SteKoe

.github/workflows/build-main.yml

@@ -77,6 +77,8 @@ jobs:
 
       - name: Publish SNAPSHOT version to GitHub Packages (we can skip tests, since we only deploy, if the build workflow succeeded)
         run: ./mvnw -B deploy --no-transfer-progress -DskipTests
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Extract Maven project version for Asciidoc GitHub Pages directory naming
         run: echo ::set-output name=version::$(./mvnw -q -Dexec.executable=echo -Dexec.args='${project.version}' --non-recursive exec:exec)