Update PUBLISHING.md

Author: malczuuu

PUBLISHING.md

@@ -7,7 +7,7 @@ See [`gradle-release.yml`](.github/workflows/gradle-release.yml) for whole publi
 Set the following environment variables in your CI/CD (GitHub Actions, etc.):
 
 ```txt
-# generated on Sonatype account
+# generated tokens on Sonatype account, do not use real username/password
 PUBLISHING_USERNAME=<username>
 PUBLISHING_PASSWORD=<password>