build(deps): bump github.com/samber/slog-gin from 1.18.0 to 1.20.0

Bumps [github.com/samber/slog-gin](https://github.com/samber/slog-gin) from 1.18.0 to 1.20.0.
- [Release notes](https://github.com/samber/slog-gin/releases)
- [Commits](samber/slog-gin@v1.18.0...v1.20.0)

---
updated-dependencies:
- dependency-name: github.com/samber/slog-gin
  dependency-version: 1.20.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

go.mod

@@ -5,7 +5,7 @@ go 1.25
 require (
 	github.com/Depado/ginprom v1.8.2
 	github.com/gin-gonic/gin v1.11.0
-	github.com/samber/slog-gin v1.18.0
+	github.com/samber/slog-gin v1.20.0
 	go.opentelemetry.io/contrib/bridges/otelslog v0.14.0
 	go.opentelemetry.io/contrib/instrumentation/github.com/gin-gonic/gin/otelgin v0.64.0
 	go.opentelemetry.io/otel v1.39.0

go.sum

@@ -104,8 +104,8 @@ github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec h1:W09IVJc94
 github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
 github.com/rogpeppe/go-internal v1.14.1 h1:UQB4HGPB6osV0SQTLymcB4TgvyWu6ZyliaW0tI/otEQ=
 github.com/rogpeppe/go-internal v1.14.1/go.mod h1:MaRKkUm5W0goXpeCfT7UZI6fk/L7L7so1lCWt35ZSgc=
-github.com/samber/slog-gin v1.18.0 h1:cshKamtS8Zqk2TTn36lfahtGTmXOzppwx9K2bBWP+0s=
-github.com/samber/slog-gin v1.18.0/go.mod h1:7R4VMQGENllRLLnwGyoB5nUSB+qzxThpGe5G02xla6o=
+github.com/samber/slog-gin v1.20.0 h1:W1f8zv7gsL6pHQG6Sm9qJ2Fvr50ifwDkUvyFChaHIBU=
+github.com/samber/slog-gin v1.20.0/go.mod h1:7R4VMQGENllRLLnwGyoB5nUSB+qzxThpGe5G02xla6o=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
 github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=