Update README.md

Author: kateinoigakukun

README.md

@@ -14,7 +14,7 @@ docker pull ghcr.io/swiftwasm/swift:latest
 
 - [5.8, 5.8-jammy, jammy, latest](https://github.com/swiftwasm/swiftwasm-docker/blob/main/5.8/ubuntu/22.04/Dockerfile)
 - [5.8-focal, focal](https://github.com/swiftwasm/swiftwasm-docker/blob/main/5.8/ubuntu/20.04/Dockerfile)
-- [5.8, 5.8-bionic](https://github.com/swiftwasm/swiftwasm-docker/blob/main/5.8/ubuntu/18.04/Dockerfile)
+- [5.8-bionic, bionic](https://github.com/swiftwasm/swiftwasm-docker/blob/main/5.8/ubuntu/18.04/Dockerfile)
 - [5.7, 5.7-bionic](https://github.com/swiftwasm/swiftwasm-docker/blob/main/5.7/ubuntu/18.04/Dockerfile)
 - [5.7-focal](https://github.com/swiftwasm/swiftwasm-docker/blob/main/5.7/ubuntu/20.04/Dockerfile)
 - [5.6, 5.6-bionic](https://github.com/swiftwasm/swiftwasm-docker/blob/main/5.6/ubuntu/18.04/Dockerfile)