Update fuzzy.mdx (#1423)

Author: mibali

docs/code-search/types/fuzzy.mdx

@@ -15,3 +15,14 @@ To open the fuzzy finder, press `Cmd+K` (macOS) or `Ctrl+K` (Linux/Windows) from
 Use the **Searching everywhere** or **Searching in this repo** filter to determine whether to search for results only in the active repository or globally.
 
 <img src="https://storage.googleapis.com/sourcegraph-assets/Fuzzy%20Finder%20-%20Search%20Scope.png" alt="Fuzzy finder" />
+
+Site admins and users can disable the Fuzzy Finder feature by adding the following configuration to their `user` or `global` settings:
+
+```
+{
+  "experimentalFeatures": {
+    "fuzzyFinder": false
+  }
+}
+```
+This setting completely disables the Fuzzy Finder for the configured scope (user or global).