fix: restrict workflow triggers to the master branch for linting and publishing

.github/workflows/lint.yml

@@ -2,9 +2,9 @@ name: Lint
 
 on:
   push:
-    branches: ["**"]
+    branches: [master]
   pull_request:
-    branches: ["**"]
+    branches: [master]
 
 jobs:
   lint:

.github/workflows/publish.yml

@@ -2,9 +2,7 @@ name: Publish to PyPI
 
 on:
   push:
-    branches: ["**"]
-  pull_request:
-    branches: ["**"]
+    branches: [master]
 
 jobs:
   build:
@@ -34,6 +32,7 @@ jobs:
     name: Publish
     needs: build
     runs-on: ubuntu-latest
+    if: github.ref == 'refs/heads/master'
     environment:
       name: pypi
       url: https://pypi.org/project/pyfragment/