[No QA] Make deploy workflow manually dispatchable

.github/workflows/cherryPick.yml

@@ -356,6 +356,9 @@ jobs:
 
           Note that you **must** test this PR, and both the author and reviewer checklist should be completed, just as if you were merging the PR to main.
 
+          > [!IMPORTANT]
+          > This PR should ideally be merged by a member of the [mobile-deployers](https://github.com/orgs/Expensify/teams/mobile-deployers) team. If it is merged by someone who is not a deployer, the staging deploy triggered by the merge will fail and will need to be manually re-triggered (not just retried) via the [deploy workflow](https://github.com/${{ github.repository }}/actions/workflows/deploy.yml).
+
           _Pro-tip:_ If this PR appears to have conflicts against the _${{ inputs.TARGET }}_ base, it means that the version on ${{ inputs.TARGET }} has been updated. The easiest thing to do if you see this is to close the PR and re-run the CP.
 
           $AUTHOR_CHECKLIST

.github/workflows/createDeployChecklist.yml

@@ -2,6 +2,11 @@ name: Create or update deploy checklist
 
 on:
   workflow_call:
+    inputs:
+      REF:
+        description: 'Git ref (branch, tag, or SHA) to check out. Defaults to the caller commit SHA.'
+        type: string
+        required: false
   workflow_dispatch:
 
 jobs:
@@ -11,6 +16,8 @@ jobs:
       - name: Checkout
         # v6
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
+        with:
+          ref: ${{ inputs.REF || github.sha }}
 
       - name: Setup Node
         uses: ./.github/actions/composite/setupNode