Specify a go release minor version (#4393)

- **PR Description**
Since they started releasing .0 versions with 1.21.0, the go version
need to be a full release version specifier and not a go language
version. They relented and added support for defaulting to a .0 release
if none is specified in later 1.23.x releases, but for users with local
1.21 or 1.22 toolchains the lack of a full release specifier breaks
them. And going forwards this is more technically correct anyway.

See golang/go#62278 (comment)

Author: stefanhaller

Diff for: go.mod

@@ -1,6 +1,6 @@
 module github.com/jesseduffield/lazygit
 
-go 1.24
+go 1.24.0
 
 require (
 	github.com/adrg/xdg v0.4.0