[bot:main] update konflux configuration

Author: openshift-pipelines-bot

.github/workflows/update-sources-release-v1.21.x.yaml

@@ -25,7 +25,7 @@ jobs:
         rm -fR upstream
         git clone https://github.com/tektoncd/pipeline upstream
         pushd upstream
-        git checkout -B release-v1.3.x origin/release-v1.3.x
+        git checkout -B release-v1.6.x origin/release-v1.6.x
         popd
     - name: Commit new changes
       run: |