fix(deps): update dependency @graphql-mesh/transform-extend to v0.9.19

Author: renovate-bot

packages/backend/package.json

@@ -38,7 +38,7 @@
     "@graphql-mesh/mysql": "0.14.23",
     "@graphql-mesh/transform-cache": "0.11.20",
     "@graphql-mesh/transform-encapsulate": "0.3.20",
-    "@graphql-mesh/transform-extend": "0.9.15",
+    "@graphql-mesh/transform-extend": "0.9.19",
     "@graphql-mesh/transform-federation": "0.8.19",
     "@graphql-mesh/transform-filter-schema": "0.14.20",
     "@graphql-mesh/transform-mock": "0.13.5",