Bump karma from 6.3.8 to 6.3.9

Bumps [karma](https://github.com/karma-runner/karma) from 6.3.8 to 6.3.9.
- [Release notes](https://github.com/karma-runner/karma/releases)
- [Changelog](https://github.com/karma-runner/karma/blob/master/CHANGELOG.md)
- [Commits](https://github.com/karma-runner/karma/compare/v6.3.8...v6.3.9)

---
updated-dependencies:
- dependency-name: karma
  dependency-type: direct:development
  update-type: version-update:semver-patch
...
Signed-off-by: dependabot[bot] <support@github.com>

yarn.lock

@@ -4600,9 +4600,9 @@ karma-source-map-support@^1.4.0:
     source-map-support "^0.5.5"
 
 karma@^6.0.1:
-  version "6.3.8"
-  resolved "https://registry.yarnpkg.com/karma/-/karma-6.3.8.tgz#6a192f24b7dddf45fad564ce2e52673aec4f746e"
-  integrity sha512-10wBBU9S0lBHhbCNfmmbWQaY5C1bXlKdnvzN2QKThujCI/+DKaezrI08l6bfTlpJ92VsEboq3zYKpXwK6DOi3A==
+  version "6.3.9"
+  resolved "https://registry.yarnpkg.com/karma/-/karma-6.3.9.tgz#cc309607f0fcdb58a88643184f3e4ba8bff26751"
+  integrity sha512-E/MqdLM9uVIhfuyVnrhlGBu4miafBdXEAEqCmwdEMh3n17C7UWC/8Kvm3AYKr91gc7scutekZ0xv6rxRaUCtnw==
   dependencies:
     body-parser "^1.19.0"
     braces "^3.0.2"