fix: Update GetBucketLocation marshaller to correctly parse S3 response

Author: dscpinheiro

generator/.DevConfigs/aa77d76a-e0f9-4f19-b0a0-ee0be3c1630f.json

@@ -0,0 +1,11 @@
+{
+    "services": [
+        {
+            "serviceName": "S3",
+            "type": "patch",
+            "changeLogMessages": [
+                "Fix generated `GetBucketLocation` operation to correctly parse response from S3."
+            ]
+        }
+    ]
+}