fix(ci): rename workflow branches

Author: androndo

.github/workflows/ci.yml

@@ -2,9 +2,9 @@ name: CI
 
 on:
   pull_request:
-    branches: [ master ]
+    branches: [ main ]
   push:
-    branches: [ master ]
+    branches: [ main ]
 
 jobs:
   verify:

.github/workflows/publish.yml

@@ -2,14 +2,14 @@ name: Build and Publish Docker Image
 
 on:
   push:
-    branches: [ master ]
+    branches: [ main ]
 
 jobs:
   build-and-publish:
     runs-on: ubuntu-latest
     steps:
     ## checks out our project source code
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
     ## Builds our docker image!
     - name: Build the Docker image