fix repo url

gradle/publish.gradle

@@ -4,7 +4,7 @@ publishing {
             credentials(PasswordCredentials.class)
 
             name = 'paper'
-            def base = 'https://papermc.io/repo/repository/maven-'
+            def base = 'https://papermc.io/repo/repository/maven'
             def releasesRepoUrl = "$base-releases/"
             def snapshotsRepoUrl = "$base-snapshots/"
             url = version.endsWith('SNAPSHOT') ? snapshotsRepoUrl : releasesRepoUrl