build(deps): bump node-fetch from 2.6.5 to 2.6.6 (nodejs#1990)

Author: dependabot[bot]

package-lock.json

@@ -43,7 +43,7 @@
     "gatsby-transformer-yaml": "^3.14.0",
     "highlight.js": "^11.3.1",
     "intersection-observer": "^0.12.0",
-    "node-fetch": "^2.6.5",
+    "node-fetch": "^2.6.6",
     "prism-react-renderer": "^1.2.1",
     "prismjs": "^1.25.0",
     "react": "^17.0.2",