Further accessibility 2024 edits. (#3840)

* Update accessibility.md

Last minute editing changes.

* Update src/content/en/2024/accessibility.md

* Update contributors.json

Adding kate as a reviewer.

* Add Kate as reviewer to chaper config

---------

Co-authored-by: Barry Pollard <barrypollard@google.com>

Author: mgifford

src/config/contributors.json

@@ -2371,6 +2371,17 @@
     },
     "twitter": "fox"
   },
+  "katekalcevich": {
+    "avatar_url": "1416158",
+    "github": "katekalcevich",
+    "linkedin": "katekalcevich",
+    "name": "Kate Kalcevich ",
+    "teams": {
+      "2024": [
+        "reviewers"
+      ]
+    }
+  },
   "tymosh": {
     "avatar_url": "25080897",
     "github": "tymosh",