Bump diff from 4.0.2 to 4.0.4 in /k8s-test

Bumps [diff](https://github.com/kpdecker/jsdiff) from 4.0.2 to 4.0.4.
- [Changelog](https://github.com/kpdecker/jsdiff/blob/master/release-notes.md)
- [Commits](kpdecker/jsdiff@v4.0.2...v4.0.4)

---
updated-dependencies:
- dependency-name: diff
  dependency-version: 4.0.4
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

k8s-test/package-lock.json

@@ -3,7 +3,7 @@
   "dependencies": {
     "chalk": "^4.1.0",
     "custom-env": "^2.0.1",
-    "diff": "^4.0.2",
+    "diff": "^4.0.4",
     "fs-extra": "^9.0.1",
     "json-diff": "^0.5.4",
     "lodash": "^4.17.20",