Update GitHub strings

See #4024

.github/dependabot.yml

@@ -48,7 +48,7 @@ updates:
     reviewers:
       - "paperless-ngx/backend"
 
-  # Enable updates for Github Actions
+  # Enable updates for GitHub Actions
   - package-ecosystem: "github-actions"
     target-branch: "dev"
     directory: "/"

.github/workflows/ci.yml

@@ -327,7 +327,7 @@ jobs:
         with:
           platforms: arm64
       -
-        name: Login to Github Container Registry
+        name: Login to GitHub Container Registry
         uses: docker/login-action@v2
         with:
           registry: ghcr.io