Document extended support for 3.7.14

Added in https://github.com/pyenv/pyenv/pull/2463

README.md

@@ -404,7 +404,7 @@ Though we don't actively maintain those patches, since existing releases never c
 it's safe to assume that they will continue working until there are further incompatible changes
 in a later version of those environments.
 
-* *3.7.8-3.7.13, 3.8.4-3.8.12, 3.9.0-3.9.7* : XCode 13.3
+* *3.7.8-3.7.14, 3.8.4-3.8.12, 3.9.0-3.9.7* : XCode 13.3
 * *3.6.15* : MacOS 11+ and XCode 13.3
 * *2.7.18* : MacOS 10.15+ and Apple Silicon