fix: use dev branch as base branch for android

Author: Bilb

actions/checkout_android/action.yml

@@ -9,7 +9,7 @@ runs:
           repository: 'oxen-io/session-android'
           path: 'android'
           submodules: recursive
-          ref: 'release/1.20.0'
+          ref: 'dev'
       - name: Remove existing strings
         shell: bash
         run: |