Fix: go-critic - Upstream Rename - v1.0.0-rc.4

Go-Critic renamed their binary from goctritic to go-critic:

• go-critic/go-critic#1482

This broke the go-critic hook. This quick fix just updates hook and README references.

Thanks to @aliceseaborn for reporting the issue [#44].

What's Changed

• fix: references to go-critic executable (renamed from gocritic) by @TekWizely in #45

Full Changelog: v1.0.0-rc.3...v1.0.0-rc.4