Build(deps): Bump node-fetch in /app/assets/javascripts (#18985)

Bumps [node-fetch](https://github.com/node-fetch/node-fetch) from 2.6.6 to 2.6.7.
- [Release notes](https://github.com/node-fetch/node-fetch/releases)
- [Commits](https://github.com/node-fetch/node-fetch/compare/v2.6.6...v2.6.7)

---
updated-dependencies:
- dependency-name: node-fetch
  dependency-type: direct:production
...

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Signed-off-by: dependabot[bot] <support@github.com>
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app/assets/javascripts/discourse/package.json

@@ -77,7 +77,7 @@
     "markdown-it": "^13.0.1",
     "message-bus-client": "^4.2.0",
     "messageformat": "0.1.5",
-    "node-fetch": "^2.6.6",
+    "node-fetch": "^2.6.7",
     "pretender": "^3.4.7",
     "pretty-text": "^1.0.0",
     "qunit": "^2.19.3",

app/assets/javascripts/yarn.lock

@@ -8005,10 +8005,10 @@ nise@^5.1.2:
     just-extend "^4.0.2"
     path-to-regexp "^1.7.0"
 
-node-fetch@^2.6.0, node-fetch@^2.6.6:
-  version "2.6.6"
-  resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.6.6.tgz#1751a7c01834e8e1697758732e9efb6eeadfaf89"
-  integrity sha512-Z8/6vRlTUChSdIgMa51jxQ4lrw/Jy5SOW10ObaA47/RElsAN2c5Pn8bTgFGWn/ibwzXTE8qwr1Yzx28vsecXEA==
+node-fetch@^2.6.0, node-fetch@^2.6.7:
+  version "2.6.7"
+  resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.6.7.tgz#24de9fba827e3b4ae44dc8b20256a379160052ad"
+  integrity sha512-ZjMPFEfVx5j+y2yF35Kzx5sF7kDzxuDj6ziH4FFbOp87zKDZNx8yExJIb05OGF4Nlt9IHFIMBkRl41VdvcNdbQ==
   dependencies:
     whatwg-url "^5.0.0"