ci: Fix branch filter

Author: tomkerkhove

.github/workflows/push-images.yml

@@ -5,7 +5,7 @@ on:
     - '.github/workflows/ci-images.yml'
     - 'src/**'
     branches:
-    - master
+    - main
 env:
   IMAGE_TAG: latest
 jobs:
@@ -76,4 +76,4 @@ jobs:
     - name: Build the Docker image
       run: docker build ./src/microservices --file ./src/microservices/Demo.Microservices.Products.API/Dockerfile --tag ${{ env.IMAGE_NAME }}:${{ env.IMAGE_TAG }}
     - name: Push the Docker image
-      run: docker push ${{ env.IMAGE_NAME }}:${{ env.IMAGE_TAG }}
+      run: docker push ${{ env.IMAGE_NAME }}:${{ env.IMAGE_TAG }}