typo fix

README.md

@@ -16,9 +16,9 @@ It is thread-safe, and doesn't leak memory.
 
 ## Usage
 We expose just two functions `new_cache(T, args...; kwargs...)` to create new tracked caches by calling `T(args...; kwargs...)`;
-and `clear_all_caches()!` which calls `empty!` on all caches that are tracked (and haven't been GCed already).
+and `clear_all_caches!()` which calls `empty!` on all caches that are tracked (and haven't been GCed already).
 
-Generally you would never all `clear_all_caches` in your code, but rather you would call it manually from the REPL while interactively developing.
+Generally you would never all `clear_all_caches!` in your code, but rather you would call it manually from the REPL while interactively developing.
 
 Be generally aware that declaring a cache using `new_cache` means someone else (developing some other package) might cause it to be cleared.
 By the nature of it being a cache this should always be fine, but exceptions are exceptional.