Remove linux/arm/v7 platform from build matrix in workflow

Author: erikologic

.github/workflows/build-and-push-bsky-ghcr.yaml

@@ -23,7 +23,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        platform: [linux/amd64, linux/arm64, linux/arm/v7]
+        platform: [linux/amd64, linux/arm64]
     steps:
       - name: Checkout repository
         uses: actions/checkout@v5