fix: golang.org/x/tools requires go 1.22

[alexandear]

The PR bumps the go version in go.mod to 1.22 because the package golang.org/x/tools requires Go 1.22.

This was discovered by simply building go-errorlint locally.

❯ git clone https://github.com/polyfloyd/go-errorlint.git
Cloning into 'go-errorlint'...
remote: Enumerating objects: 787, done.
remote: Counting objects: 100% (123/123), done.
remote: Compressing objects: 100% (79/79), done.
remote: Total 787 (delta 75), reused 52 (delta 39), pack-reused 664 (from 1)
Receiving objects: 100% (787/787), 122.00 KiB | 1.56 MiB/s, done.
Resolving deltas: 100% (440/440), done.
❯ cd go-errorlint
❯ go version
go version go1.23.3 darwin/arm64
❯ go build -v
go: updates to go.mod needed; to update it:
        go mod tidy

[polyfloyd]

Huh, odd. The CI should have caught that. Thanks