Update README.md

Author: sigpwned

README.md

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 # AWS Lambda Java Base Images
 
-This project provides the missing [AWS Lambda base image](https://docs.aws.amazon.com/lambda/latest/dg/runtimes-images.html) for Java 17 and 18. The base images are publicly available [in the ECR Public Gallery](https://gallery.ecr.aws/aleph0io/lambda/java). You should be able to use them directly in your builds. I expect to use these base images for production lambda functions reasonably soon, but in the meantime please consider them to be *very experimental*.
+This project provides the missing [AWS Lambda base image](https://docs.aws.amazon.com/lambda/latest/dg/runtimes-images.html) for Java 17, 18, and 19. The base images are publicly available [in the ECR Public Gallery](https://gallery.ecr.aws/aleph0io/lambda/java). You should be able to use them directly in your builds. I use these images in production for personal projects today, but they should be considered experimental.
 
 ## Approach