docs: Update README.md with go-lambda-cleanup (#5122)

README.md

@@ -2682,6 +2682,7 @@ _General utilities and tools to make your life easier._
 - [go-funk](https://github.com/thoas/go-funk) - Modern Go utility library which provides helpers (map, find, contains, filter, chunk, reverse, ...).
 - [go-health](https://github.com/Talento90/go-health) - Health package simplifies the way you add health check to your services.
 - [go-httpheader](https://github.com/mozillazg/go-httpheader) - Go library for encoding structs into Header fields.
+- [go-lambda-cleanup](https://github.com/karl-cardenas-coding/go-lambda-cleanup) - A CLI for removing unused or previous versions of AWS Lambdas. 
 - [go-lock](https://github.com/viney-shih/go-lock) - go-lock is a lock library implementing read-write mutex and read-write trylock without starvation.
 - [go-pattern-match](https://github.com/PhakornKiong/go-pattern-match) - A Pattern matching library inspired by ts-pattern.
 - [go-pkg](https://github.com/chenquan/go-pkg) - A go toolkit.