Simplify fmt.Sprintf %c to string conversion

Proprietary

Replace fmt.Sprintf("%c", r) with string(r) for better performance.

org.openrewrite.golang.codequality.SimplifySprintfChar

mod run . --recipe=org.openrewrite.golang.codequality.SimplifySprintfChar

Install it once, then run it on every repository under the current directory. New to the Moderne CLI? Set it up.