Docs: fix category descriptions for site generation (fixes #12894) (#12930)

Author: Kai Cataldo

conf/category-list.json

@@ -10,12 +10,12 @@
  ],
  "deprecated": {
  "name": "Deprecated",
- "description": "These rules have been deprecated in accordance with the [deprecation policy](/docs/user-guide/rule-deprecation), and replaced by newer rules:",
+ "description": "These rules have been deprecated in accordance with the <a href=\"/docs/user-guide/rule-deprecation\">deprecation policy</a>, and replaced by newer rules:",
  "rules": []
  },
  "removed": {
  "name": "Removed",
- "description": "These rules from older versions of ESLint (before the [deprecation policy](/docs/user-guide/rule-deprecation) existed) have been replaced by newer rules:",
+ "description": "These rules from older versions of ESLint (before the <a href=\"/docs/user-guide/rule-deprecation\">deprecation policy</a> existed) have been replaced by newer rules:",
  "rules": [
  { "removed": "generator-star", "replacedBy": ["generator-star-spacing"] },
  { "removed": "global-strict", "replacedBy": ["strict"] },