add workflow_dispatch to other workflow files

.github/workflows/assign_milestone.yml

@@ -20,6 +20,7 @@
 name: Assign Milestone on issue close
 
 on:
+  workflow_dispatch:
   issues:
     types: [closed]
 

.github/workflows/cancel.yml

@@ -18,6 +18,7 @@
 name: Cancel
 
 on:
+  workflow_dispatch:
   workflow_run:
     workflows:
       - "Build python source distribution and wheels"

.github/workflows/issue-tagger.yml

@@ -15,6 +15,7 @@
 
 name: IssueTagger
 on:
+  workflow_dispatch:
   issues:
     types: [opened]
 

.github/workflows/label_prs.yml

@@ -17,7 +17,7 @@
 # paths that are modified in the pull request.
 
 name: LabelPrs
-on: [pull_request_target]
+on: [pull_request_target, workflow_dispatch]
 permissions: read-all
 jobs:
   label:

.github/workflows/pr-bot-pr-updates.yml

@@ -15,6 +15,7 @@
 
 name: pr-bot-pr-updates
 on:
+  workflow_dispatch:
   pull_request_target:
     types: ["synchronize"] # Synchronize is the action that runs after pushes to the user branch
   issue_comment:

.github/workflows/python_dependency_tests.yml

@@ -1,6 +1,7 @@
 name: Python Dependency Tests
 
 on:
+  workflow_dispatch:
   schedule:
     - cron: '10 2 * * *'
   pull_request:

.github/workflows/self-assign.yml

@@ -15,6 +15,7 @@
 
 name: Assign or close an issue
 on: 
+  workflow_dispatch:
   issue_comment:
     types: [created]
 jobs:

.github/workflows/tour_of_beam_backend_integration.yml

@@ -20,6 +20,7 @@
 name: Tour of Beam Go integration tests
 
 on:
+  workflow_dispatch:
   push:
     branches: ['master', 'release-*']
     tags: 'v*'

.github/workflows/triaged-on-assign.yml

@@ -15,6 +15,7 @@
 
 name: Mark issue as triaged when assigned
 on:
+  workflow_dispatch:
   issues:
     types: [assigned]
 jobs: