Bump ssri from 6.0.1 to 6.0.2 in /css

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](npm/ssri@v6.0.1...v6.0.2)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

css/yarn.lock

@@ -1406,7 +1406,7 @@ fastparse@^1.1.2:
 
 figgy-pudding@^3.5.1:
   version "3.5.2"
-  resolved "https://registry.npmjs.org/figgy-pudding/-/figgy-pudding-3.5.2.tgz"
+  resolved "https://registry.yarnpkg.com/figgy-pudding/-/figgy-pudding-3.5.2.tgz#b4eee8148abb01dcf1d1ac34367d59e12fa61d6e"
   integrity sha512-0btnI/H8f2pavGMN8w40mlSKOfTK2SVJmBfBeVIj3kNw0swwgzyRq0d5TJVOwodFmtvpPeWPN/MCcfuWF0Ezbw==
 
 [email protected]:
@@ -3667,9 +3667,9 @@ sprintf-js@~1.0.2:
   integrity sha1-BOaSb2YolTVPPdAVIDYzuFcpfiw=
 
 ssri@^6.0.1:
-  version "6.0.1"
-  resolved "https://registry.npmjs.org/ssri/-/ssri-6.0.1.tgz"
-  integrity sha512-3Wge10hNcT1Kur4PDFwEieXSCMCJs/7WvSACcrMYrNp+b8kDL1/0wJch5Ni2WrtwEa2IO8OsVfeKIciKCDx/QA==
+  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"