Bump webpack from 5.75.0 to 5.76.1 in /packages/labextension

Bumps [webpack](https://github.com/webpack/webpack) from 5.75.0 to 5.76.1.
- [Release notes](https://github.com/webpack/webpack/releases)
- [Commits](webpack/webpack@v5.75.0...v5.76.1)

---
updated-dependencies:
- dependency-name: webpack
  dependency-type: indirect
...

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

packages/labextension/yarn.lock

@@ -5473,9 +5473,9 @@ webpack-sources@^3.2.3:
   integrity sha512-/DyMEOrDgLKKIG0fmvtz+4dUX/3Ghozwgm6iPp8KRhvn+eQf9+Q7GWxVNMk3+uCPWfdXYC4ExGBckIXdFEfH1w==
 
 webpack@^5.41.1:
-  version "5.75.0"
-  resolved "https://registry.yarnpkg.com/webpack/-/webpack-5.75.0.tgz#1e440468647b2505860e94c9ff3e44d5b582c152"
-  integrity sha512-piaIaoVJlqMsPtX/+3KTTO6jfvrSYgauFVdt8cr9LTHKmcq/AMd4mhzsiP7ZF/PGRNPGA8336jldh9l2Kt2ogQ==
+  version "5.76.1"
+  resolved "https://registry.yarnpkg.com/webpack/-/webpack-5.76.1.tgz#7773de017e988bccb0f13c7d75ec245f377d295c"
+  integrity sha512-4+YIK4Abzv8172/SGqObnUjaIHjLEuUasz9EwQj/9xmPPkYJy2Mh03Q/lJfSD3YLzbxy5FeTq5Uw0323Oh6SJQ==
   dependencies:
     "@types/eslint-scope" "^3.7.3"
     "@types/estree" "^0.0.51"