fix(go-cache): add s3-region input and support region flag in GOCACHEPROG

.gitea/actions/go-cache/action.yml

@@ -19,6 +19,10 @@ inputs:
     description: S3 bucket for go cache. Leave empty to use local caching only.
     default: ""
     required: false
+  s3-region:
+    description: S3 region name.
+    default: auto
+    required: false
   s3-endpoint:
     description: Optional S3-compatible endpoint URL, for example https://s3.example.com.
     default: ""
@@ -58,7 +62,7 @@ runs:
         mkdir -p "$CACHE_DIR"
         
         # Build GOCACHEPROG command
-        CMD="$HOME/go/bin/go-cache-plugin --cache-dir=$CACHE_DIR --bucket=${{ inputs.s3-bucket }}"
+        CMD="$HOME/go/bin/go-cache-plugin --cache-dir=$CACHE_DIR --bucket=${{ inputs.s3-bucket }} --region=${{ inputs.s3-region }}"
         
         if [ -n "${{ inputs.s3-endpoint }}" ]; then
           CMD="$CMD --s3-endpoint-url=${{ inputs.s3-endpoint }}"