[bot:main] update konflux configuration

Author: openshift-pipelines-bot

.github/workflows/update-sources-release-v1.15.x.yaml

@@ -25,7 +25,7 @@ jobs:
         rm -fR upstream
         git clone https://github.com/tektoncd/cli upstream
         pushd upstream
-        git checkout -B release-v0.37.2 origin/release-v0.37.2
+        git checkout -B release-v0.37.3 origin/release-v0.37.3
         popd