Bump tough-cookie from 2.3.2 to 2.3.4 in /examples/webpack-vanilla-dom

Bumps [tough-cookie](https://github.com/salesforce/tough-cookie) from 2.3.2 to 2.3.4.
- [Release notes](https://github.com/salesforce/tough-cookie/releases)
- [Commits](salesforce/tough-cookie@v2.3.2...v2.3.4)

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

examples/webpack-vanilla-dom/yarn.lock

@@ -3820,8 +3820,8 @@ toidentifier@1.0.0:
   resolved "https://registry.yarnpkg.com/toidentifier/-/toidentifier-1.0.0.tgz#7e1be3470f1e77948bc43d94a3c8f4d7752ba553"
 
 tough-cookie@~2.3.0:
-  version "2.3.2"
-  resolved "https://registry.yarnpkg.com/tough-cookie/-/tough-cookie-2.3.2.tgz#f081f76e4c85720e6c37a5faced737150d84072a"
+  version "2.3.4"
+  resolved "https://registry.yarnpkg.com/tough-cookie/-/tough-cookie-2.3.4.tgz#ec60cee38ac675063ffc97a5c18970578ee83655"
   dependencies:
     punycode "^1.4.1"