Use "main" as the version for prebuilt frameworks. (#3161)

Summary:

.

Reviewed By: kirklandsign

Differential Revision: D56363475

Author: shoumikhin

.github/workflows/apple.yml

@@ -58,7 +58,7 @@ jobs:
       timeout: 90
       script: |
         BUILD_TOOL=cmake
-        VERSION="0.1.0"
+        VERSION="main"
         FRAMEWORKS=(
           "executorch"
           "coreml_backend"