Update README.md

Author: radex

README.md

@@ -7,7 +7,7 @@ To compare the stdlib headers between 2 betas, go to:
 
 https://github.com/radex/swift_stdlib/compare/6.1-beta1...6.1-beta2.diff
 
-And replace `6.1-beta1` and `6.1-beta2` with the two versions you're interested in. Versions are labeled like so: `6.0-beta2`, `6.0-gm`, `6.0`. To see all the version tags, see https://github.com/radex/swift_stdlib/releases.
+And replace `6.1-beta1` and `6.1-beta2` with the two versions you're interested in. Versions are labeled like so: `6.0-beta2`, `6.0-gm`, `6.1-gm-seed2`, `6.0.1`. To see all the version tags, see https://github.com/radex/swift_stdlib/releases.
 
 Note that at the moment, the order of function overrides appears quite random — that's why in every beta there's a lot of lines changed, but there are usually few actual changes hidden in the noise.