fix: generate settings.xml for maven release

Author: Nylle

.github/workflows/publish-to-maven-central.yml

@@ -26,6 +26,11 @@ jobs:
         with:
           java-version: 11
 
+      - name: Generate settings.xml
+        uses: whelk-io/maven-settings-xml-action@v22
+        with:
+          servers: '[{ "id": "central", "username": ${{ secrets.NEXUS_USERNAME }}, "password": ${{ secrets.NEXUS_PASSWORD }} }]'
+
       - name: Release Maven package
         uses: WasiqB/maven-publish-action@v1
         with: