chore: Add sloglint in golangci-lint

The migration from logrus to slog is done recently, add linter for
consistency in the future.

Signed-off-by: Tam Mach <[email protected]>

Author: sayboras

.golangci.yml

@@ -23,6 +23,7 @@ linters:
     - modernize
     - perfsprint
     - revive
+    - sloglint
     - staticcheck
     - testifylint
     - unused