Fix access by CI

Author: cowtowncoder

.github/workflows/main.yml

@@ -39,6 +39,12 @@ jobs:
         distribution: 'temurin'
         java-version: ${{ matrix.java_version }}
         cache: 'maven'
+    - name: Set up Maven deployment credentials
+      if: ${{ github.event_name != 'pull_request' }}
+      uses: actions/setup-java@dded0888837ed1f317902acf8a20df0ad188d165 # v5.0.0
+      with:
+        distribution: 'temurin'
+        java-version: ${{ matrix.java_version }}
         server-id: central-snapshots
         server-username: CI_DEPLOY_USERNAME
         server-password: CI_DEPLOY_PASSWORD