Bump ssri from 6.0.1 to 6.0.2 in /frontend

Bumps [ssri](https://github.com/npm/ssri) from 6.0.1 to 6.0.2.
- [Release notes](https://github.com/npm/ssri/releases)
- [Changelog](https://github.com/npm/ssri/blob/v6.0.2/CHANGELOG.md)
- [Commits](https://github.com/npm/ssri/compare/v6.0.1...v6.0.2)

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

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

frontend/yarn.lock

@@ -4363,8 +4363,8 @@ faye-websocket@^0.11.3:
 
 figgy-pudding@^3.5.1:
   version "3.5.2"
-  resolved "https://registry.npm.taobao.org/figgy-pudding/download/figgy-pudding-3.5.2.tgz#b4eee8148abb01dcf1d1ac34367d59e12fa61d6e"
-  integrity sha1-tO7oFIq7Adzx0aw0Nn1Z4S+mHW4=
+  resolved "https://registry.yarnpkg.com/figgy-pudding/-/figgy-pudding-3.5.2.tgz#b4eee8148abb01dcf1d1ac34367d59e12fa61d6e"
+  integrity sha512-0btnI/H8f2pavGMN8w40mlSKOfTK2SVJmBfBeVIj3kNw0swwgzyRq0d5TJVOwodFmtvpPeWPN/MCcfuWF0Ezbw==
 
 figures@^3.0.0:
   version "3.2.0"
@@ -8619,9 +8619,9 @@ sshpk@^1.7.0:
     tweetnacl "~0.14.0"
 
 ssri@^6.0.1:
-  version "6.0.1"
-  resolved "https://registry.npm.taobao.org/ssri/download/ssri-6.0.1.tgz#2a3c41b28dd45b62b63676ecb74001265ae9edd8"
-  integrity sha1-KjxBso3UW2K2Nnbst0ABJlrp7dg=
+  version "6.0.2"
+  resolved "https://registry.yarnpkg.com/ssri/-/ssri-6.0.2.tgz#157939134f20464e7301ddba3e90ffa8f7728ac5"
+  integrity sha512-cepbSq/neFK7xB6A50KHN0xHDotYzq58wWCa5LeWqnPrHG8GzfEjO/4O8kpmcGW+oaxkvhEJCWgbgNk4/ZV93Q==
   dependencies:
     figgy-pudding "^3.5.1"