Support dispatching the publish-release CI script (#649)

Author: TwitchBronBron

.github/workflows/publish-release.yml

@@ -7,12 +7,18 @@ on:
     paths:
         - 'package.json'
         - 'package-lock.json'
+  workflow_dispatch:
+    inputs:
+      tag:
+        type: string
+        description: "The release tag that should be published (i.e. `v1.2.3`)"
+        required: true
 
 jobs:
   run:
     if: startsWith( github.head_ref, 'release/')
     uses: rokucommunity/workflows/.github/workflows/publish-release.yml@master
     with:
       release-type: "vsce"
-      ref: ${{ github.event.pull_request.merge_commit_sha }}
+      ref: ${{ github.event.inputs.tag || github.event.pull_request.merge_commit_sha }}
     secrets: inherit