AppRunner: Clone specific branch instead of always running master

Change-Id: I262d232f5fa1648474eb8bb55ce13f986507b0d4
diff --git a/charts/app-runner/templates/install.yaml b/charts/app-runner/templates/install.yaml
index f3b2a00..b9ecdbb 100644
--- a/charts/app-runner/templates/install.yaml
+++ b/charts/app-runner/templates/install.yaml
@@ -100,6 +100,7 @@
         - --app-id={{ .Values.appId }}
         - --app-dir={{ .Values.appDir }}
         - --repo-addr={{ .Values.repoAddr }}
+        - --branch={{ .Values.branch }}
         - --ssh-key=/pcloud/ssh-key/private
         - --run-cfg=/pcloud/config/run
         - --manager-addr={{ .Values.managerAddr }}