make branch builds strict, set an exception for 8.1.x branches
diff --git a/jenkins/github/docs.pipeline b/jenkins/github/docs.pipeline
index 63767b3..a16c492 100644
--- a/jenkins/github/docs.pipeline
+++ b/jenkins/github/docs.pipeline
@@ -84,7 +84,7 @@
                     cat ${tmpfile}
                     pipenv run ${tmpfile} || exit 1
                     rm ${tmpfile}
-                    
+
                     # If we made it here, the doc build ran and succeeded. Let's copy out the
                     # docbuild contents so it can be published.
                     export_dir="${WORKSPACE}/output/${GITHUB_PR_NUMBER}"