Files may specify their own Go language version via a build tag. For instance:

//go:build go1.22

indicates that this file requires Go language version 1.22.

If the language version in the build tag contains dot-release information, say it's "go1.22.1", it is invalid.
The compiler simply ignores the version (it doesn't use, say "go1.22").

It seems (to me) that this shouldn't be silently ignored as it might be very confusing for users. go vet might be the right tool to report an error. Alternatively, the compiler could report an error, but generally, the compiler doesn't complain about errors in (pragma and build) comments.