ci: pass GitHub package registry keys in the right properties

The properties provided so far were expected as environment variables.
This commit switches the CI config to provide the expected property
names.

Author: languitar

.github/workflows/publish.yml

@@ -27,7 +27,7 @@ jobs:
       - name: Use tag as version
         run: echo "${GITHUB_REF#refs/*/}" > version.txt
       - name: Build and Publish Artifacts
-        run: ./gradlew build publish -PciBuild=true -Partifacts.itemis.cloud.user=${{secrets.ARTIFACTS_ITEMIS_CLOUD_USER}} -Partifacts.itemis.cloud.pw=${{secrets.ARTIFACTS_ITEMIS_CLOUD_PW}} -PGITHUB_ACTOR=${{ github.actor }} -PGITHUB_TOKEN=${{ secrets.GITHUB_TOKEN }}
+        run: ./gradlew build publish -PciBuild=true -Partifacts.itemis.cloud.user=${{secrets.ARTIFACTS_ITEMIS_CLOUD_USER}} -Partifacts.itemis.cloud.pw=${{secrets.ARTIFACTS_ITEMIS_CLOUD_PW}} -Pgpr.user=${{ github.actor }} -Pgpr.key=${{ secrets.GITHUB_TOKEN }}
         env:
           NODE_AUTH_TOKEN: ${{ secrets.ARTIFACTS_ITEMIS_CLOUD_NPM_TOKEN }}
       - name: Set up QEMU