Use NEXUS_TOKEN secrets for Maven Central publishing

The NEXUS_TOKEN_* secrets contain the Central Portal token credentials.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: zeevmoney

.github/workflows/publish.yaml

@@ -40,8 +40,7 @@ jobs:
       - name: Publish to Maven Central
         run: ./gradlew publishAndReleaseToMavenCentral
         env:
-          # The "OSSRH_*" varaibles were created before this project migrated to Maven Central.
-          ORG_GRADLE_PROJECT_mavenCentralUsername: ${{ secrets.OSSRH_USERNAME }}
-          ORG_GRADLE_PROJECT_mavenCentralPassword: ${{ secrets.OSSRH_PASSWORD }}
+          ORG_GRADLE_PROJECT_mavenCentralUsername: ${{ secrets.NEXUS_TOKEN_USERNAME }}
+          ORG_GRADLE_PROJECT_mavenCentralPassword: ${{ secrets.NEXUS_TOKEN_PASSWORD }}
           ORG_GRADLE_PROJECT_signingInMemoryKey: ${{ secrets.GPG_SIGNING_KEY }}
           ORG_GRADLE_PROJECT_signingInMemoryKeyPassword: ${{ secrets.GPG_SIGNING_PASSPHRASE }}