chore(deps): update dependency @bufbuild/buf to v1.56.0

Author: renovate[bot]

package.json

@@ -101,7 +101,7 @@
     "zod": "3.25.76"
   },
   "devDependencies": {
-    "@bufbuild/buf": "1.55.1",
+    "@bufbuild/buf": "1.56.0",
     "@bufbuild/protoc-gen-es": "2.6.1",
     "@playwright/test": "1.54.1",
     "@squonk/eslint-config": "3.0.0",