Allow tests to run manually

Avoids having to push, e.g. when adding a tag or updating credentials.

.github/workflows/run-tests-pebble.yml

@@ -8,6 +8,9 @@ on:
   pull_request:
     branches:
       - master
+  workflow_dispatch:
+    branches:
+      - master
 jobs:
   test-alpine:
     runs-on: ubuntu-latest

.github/workflows/run-tests-staging-duckdns.yml

@@ -8,6 +8,9 @@ on:
   pull_request:
     branches:
       - master
+  workflow_dispatch:
+    branches:
+      - master
 env:
   DUCKDNS_TOKEN: ${{ secrets.DUCKDNS_TOKEN }}
 jobs:

.github/workflows/run-tests-staging-dynu.yml

@@ -8,6 +8,9 @@ on:
   pull_request:
     branches:
       - master
+  workflow_dispatch:
+    branches:
+      - master
 env:
   DYNU_API_KEY: ${{ secrets.DYNU_API_KEY }}
 jobs:

.github/workflows/shellcheck.yml

@@ -7,6 +7,9 @@ on:
     branches: [ master ]
   pull_request:
     branches: [ master ]
+  workflow_dispatch:
+    branches:
+      - master
 
 jobs:
   lint: