ci: Update build.yml workflow

Author: NGPixel

.github/workflows/build.yml

@@ -31,6 +31,11 @@ on:
         default: false
         required: true
         type: boolean
+      skiparm:
+        description: 'Skip ARM64 Build'
+        default: false
+        required: true
+        type: boolean
       ignoreLowerCoverage:
         description: 'Ignore Lower Coverage'
         default: false
@@ -245,7 +250,7 @@ jobs:
       with:
         context: .
         file: dev/build/Dockerfile
-        platforms: linux/amd64,linux/arm64
+        platforms: ${{ github.event.inputs.skiparm == 'true' && 'linux/amd64' || 'linux/amd64,linux/arm64' }}
         push: true
         tags: ghcr.io/ietf-tools/datatracker:${{ env.PKG_VERSION }}
         cache-from: type=gha