Canvas: Fix INTERNAL_API_ADDR

Change-Id: I1079a5db68b1d850ab36314018b6c5a96dee1bc2
diff --git a/core/installer/samples/canvas.rest b/core/installer/samples/canvas.rest
index d2a0c8c..1ff7356 100644
--- a/core/installer/samples/canvas.rest
+++ b/core/installer/samples/canvas.rest
@@ -33,7 +33,7 @@
 		  }
         ],
         "source": {
-          "branch": "main",
+          "branch": "canvas",
           "repository": "https://code.v1.dodo.cloud/pcloud",
           "rootDir": "apps/canvas/back"
         },