fix: typo of CacheReader comment

Author: Yesphet

pkg/cache/internal/cache_reader.go

@@ -36,7 +36,7 @@ import (
 // CacheReader is a client.Reader.
 var _ client.Reader = &CacheReader{}
 
-// CacheReader wraps a cache.Index to implement the client.CacheReader interface for a single type.
+// CacheReader wraps a cache.Index to implement the client.Reader interface for a single type.
 type CacheReader struct {
 	// indexer is the underlying indexer wrapped by this cache.
 	indexer cache.Indexer