Update libs/hooks/debounce/README.md

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
Signed-off-by: Todd Baert <[email protected]>

Author: toddbaert

libs/hooks/debounce/README.md

@@ -33,7 +33,7 @@ client.addHooks(debounceHook);
 ```
 
 The hook maintains a simple expiring cache with a fixed max size and keeps a record of recent evaluations based on an optional key-generation function (keySupplier).
-Be default, the key-generation function is purely based on the flag key.
+By default, the key-generation function is purely based on the flag key.
 Particularly in server use-cases, you may want to take the targetingKey or other contextual information into account in your debouncing:
 
 ```ts