AppRunner: Clone specific branch instead of always running master

Change-Id: I262d232f5fa1648474eb8bb55ce13f986507b0d4
diff --git a/charts/app-runner/values.yaml b/charts/app-runner/values.yaml
index 9145c47..88958ae 100644
--- a/charts/app-runner/values.yaml
+++ b/charts/app-runner/values.yaml
@@ -3,6 +3,7 @@
   tag: latest
   pullPolicy: Always
 repoAddr: 192.168.0.11
+branch: "master"
 sshPrivateKey: key
 appId: ""
 runCfg: ""