fixes(ci) improve workflow trigger

Author: antechrestos

.github/workflows/pythonpackage.yml

@@ -1,10 +1,14 @@
 name: Python package
 
-on: [push, pull_request]
+on:
+  workflow_dispatch:
+  pull_request:
+  push:
+    branches:
+      - main
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
     strategy:
       max-parallel: 1
@@ -13,16 +17,20 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
+
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
+
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
         pip install -r requirements.txt
         pip install -r dev-requirements.txt
+
     - name: Launch tests
       run: python setup.py test
+
     - name: Launch Linting
       run: flake8 --show-source --statistics