Use bitbucket-branch-source incremental

jenkinsci/bitbucket-branch-source-plugin#1049

Author: MarkEWaite

bom-weekly/pom.xml

@@ -926,7 +926,7 @@
       <dependency>
         <groupId>org.jenkins-ci.plugins</groupId>
         <artifactId>cloudbees-bitbucket-branch-source</artifactId>
-        <version>936.2.0</version>
+        <version>936.2.11089.v3326b_f565c26</version>
       </dependency>
       <dependency>
         <groupId>org.jenkins-ci.plugins</groupId>