improve release (#1187)

Signed-off-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com>

RELEASING.md

@@ -19,10 +19,12 @@ git push origin v<VERSION>
 
 This will trigger the release workflow which will deploy the release to Maven Central.
 
-Go to https://central.sonatype.com/publishing/deployments to publish the release to Maven Central.
-
 ## Create a Release 
 
+Wait for the release to appear on Maven Central at 
+https://mvnrepository.com/artifact/io.prometheus/prometheus-metrics-core. 
+Once it is available, create a release on Github.
+
 1. Go to https://github.com/prometheus/client_java/releases
 2. Click on "Choose a tag", enter the tag name (e.g. `v0.1.0`), and click "Create a new tag".
 3. Click on "Generate release notes" to auto-generate the release notes based on the commits since the last release.

pom.xml

@@ -467,7 +467,8 @@
                         <extensions>true</extensions>
                         <configuration>
                             <publishingServerId>ossrh</publishingServerId>
-                            <autoPublish>false</autoPublish>
+                            <autoPublish>true</autoPublish>
+                            <waitUntil>published</waitUntil>
                         </configuration>
                     </plugin>
                 </plugins>