Remove useBeta property from pom.xml (#976)

Remove useBeta property from pom.xml

Author: strangelookingnerd

pom.xml

@@ -28,7 +28,7 @@
         <changelist>-SNAPSHOT</changelist>
         <gitHubRepo>jenkinsci/bitbucket-branch-source-plugin</gitHubRepo>
         <jenkins.baseline>2.504</jenkins.baseline>
-        <jenkins.version>${jenkins.baseline}.2</jenkins.version>
+        <jenkins.version>${jenkins.baseline}.1</jenkins.version>
         <hpi.compatibleSinceVersion>936.0.0</hpi.compatibleSinceVersion>
         <tagNameFormat>@{project.version}</tagNameFormat>
     </properties>