Update README.md

README.md

@@ -53,7 +53,7 @@ error: unable to download 'http://127.0.0.1:37515/<...>': HTTP error 418
        GitHub API error: API error (429 Too Many Requests): StructuredApiError { message: "Request was blocked due to exceeding usage of resource 'Count' in namespace ''." }
 ```
 
-The caching daemon and Nix both handle this gracefully, and won't not cause your CI to fail.
+The caching daemon and Nix both handle this gracefully, and won't cause your CI to fail.
 When the rate limit is exceeded while pulling dependencies, your workflow may perform more builds than usual.
 When the rate limit is exceeded while uploading to the cache, the remainder of those store paths will be uploaded on the next run of the workflow.