Improve the daily.yml workflow (#8737)

Author: AlexWaygood

.github/workflows/daily.yml

@@ -15,7 +15,7 @@ env:
 jobs:
   stubtest-stdlib:
     name: Check stdlib with stubtest
-    if: github.repository == 'python/typeshed'
+    if: ${{ github.repository == 'python/typeshed' || github.event_name == 'workflow_dispatch' }}
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
@@ -38,7 +38,7 @@ jobs:
 
   stubtest-third-party:
     name: Check third party stubs with stubtest
-    if: github.repository == 'python/typeshed'
+    if: ${{ github.repository == 'python/typeshed' || github.event_name == 'workflow_dispatch' }}
     runs-on: ubuntu-20.04
     strategy:
       matrix:
@@ -76,4 +76,5 @@ jobs:
               repo: "typeshed",
               title: `Stubtest failed on ${new Date().toDateString()}`,
               body: "Stubtest runs are listed here: https://github.com/python/typeshed/actions/workflows/daily.yml",
+              labels: ["help wanted"],
             })