Fix version bump workflow on call (#2900)

.github/workflows/version-bump.yml

@@ -22,6 +22,9 @@ jobs:
     steps:
       - name: Checkout Branch
         uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608 # v4.1.0
+        with:
+          repository: bitwarden/mobile
+          ref: master
 
       - name: Login to Azure - CI Subscription
         uses: Azure/login@92a5484dfaf04ca78a94597f4f19fea633851fa2 # v1.4.7
@@ -143,7 +146,7 @@ jobs:
           TITLE: "Bump version to ${{ inputs.version_number }}"
         run: |
           PR_URL=$(gh pr create --title "$TITLE" \
-            --base "$GITHUB_REF" \
+            --base "master" \
             --head "$PR_BRANCH" \
             --label "version update" \
             --label "automated pr" \