Fix typo

Author: bartdevriendt

.github/workflows/main.yml

@@ -2,15 +2,15 @@ name:  Main branch build
 
 on:
     push:
-        - branches:['main']
+        branches: ['main']
 
 jobs:
     docker-build:
         runs-on: ubuntu-latest
         steps:
             - name: Checkout
               uses: actions/checkout@v4
-              
+
             - name: Login to Docker Hub
               uses: docker/login-action@v3
               with: