Bump slug from 9.1.0 to 10.0.0 in /backend

Bumps [slug](https://github.com/Trott/slug) from 9.1.0 to 10.0.0.
- [Changelog](https://github.com/Trott/slug/blob/main/CHANGELOG.md)
- [Commits](Trott/slug@v9.1.0...v10.0.0)

---
updated-dependencies:
- dependency-name: slug
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

backend/package.json

@@ -87,7 +87,7 @@
     "nodemailer-html-to-text": "^3.2.0",
     "request": "~2.88.2",
     "sanitize-html": "~2.13.1",
-    "slug": "~9.1.0",
+    "slug": "~10.0.0",
     "subscriptions-transport-ws": "^0.9.19",
     "trunc-html": "~1.1.2",
     "uuid": "~9.0.1",

backend/yarn.lock

@@ -8573,10 +8573,10 @@ slug@^8.2.2:
   resolved "https://registry.yarnpkg.com/slug/-/slug-8.2.2.tgz#33b019a857a11fc4773c1e9a9f60e3da651a9e5d"
   integrity sha512-5ByW6qXqPeG0Tmlkh24JhdXhvQsbaJSjVr3GgGxUV0BSskZKKBZZfFWxezap8+fh1vxBN9GVbqI1V6nqAFxlBg==
 
-slug@~9.1.0:
-  version "9.1.0"
-  resolved "https://registry.yarnpkg.com/slug/-/slug-9.1.0.tgz#246baf1e9d8e821f7f5863a7c8bdd86a7ec3f12c"
-  integrity sha512-ioOsCfzQSu+D6NZ8XMCR8IW9FgvF8W7Xzz56hBkB/ALvNaWeBs2MUvvPugq3GCrxfHPFeK6hAxGkY/WLnfX2Lg==
+slug@~10.0.0:
+  version "10.0.0"
+  resolved "https://registry.yarnpkg.com/slug/-/slug-10.0.0.tgz#1af6259e37201497c7bb31b4b8187520c9f3ebb6"
+  integrity sha512-M8s2PWOUeSCdD4S1NH5lCzXg2zFV1fozrtfr0FSKl65x+EF1rUowj+/vyFlnHgxPxWzT+DL0VXKfYc1DHJoymg==
 
 smart-buffer@^4.2.0:
   version "4.2.0"