Configure Sonatype Nexus Username

With Sonatype requiring the usage of a token instead of username/password. The username can no longer be hardcoded and must also be read from secrets. Fixes: #376

Author: mpkorstanje

.github/workflows/release-sbt.yml

@@ -34,9 +34,8 @@ jobs:
  with:
  gpg-private-key: ${{ secrets.GPG_PRIVATE_KEY }}
  gpg-passphrase: ${{ secrets.GPG_PASSPHRASE }}
- nexus-username: cukebot
+ nexus-username: ${{ secrets.SONATYPE_USERNAME }}
  nexus-password: ${{ secrets.SONATYPE_PASSWORD }}
- working-directory: .
 
  create-github-release:
  name: Create GitHub Release and Git tag