fix(gatsby-plugin-page-creator): add missing telemetry dependency (#28652)

Author: pieh

packages/gatsby-plugin-page-creator/package.json

@@ -29,6 +29,7 @@
     "chokidar": "^3.4.2",
     "fs-exists-cached": "^1.0.0",
     "gatsby-page-utils": "^0.7.0-next.0",
+    "gatsby-telemetry": "^1.8.0-next.0",
     "globby": "^11.0.1",
     "lodash": "^4.17.20"
   },