build(deps): bump github.com/nats-io/nats-server/v2

Bumps [github.com/nats-io/nats-server/v2](https://github.com/nats-io/nats-server) from 2.12.5 to 2.12.6.
- [Release notes](https://github.com/nats-io/nats-server/releases)
- [Changelog](https://github.com/nats-io/nats-server/blob/main/RELEASES.md)
- [Commits](https://github.com/nats-io/nats-server/compare/v2.12.5...v2.12.6)

---
updated-dependencies:
- dependency-name: github.com/nats-io/nats-server/v2
  dependency-version: 2.12.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

go.mod

@@ -55,7 +55,7 @@ require (
 	github.com/mitchellh/mapstructure v1.5.0
 	github.com/mna/pigeon v1.3.0
 	github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826
-	github.com/nats-io/nats-server/v2 v2.12.5
+	github.com/nats-io/nats-server/v2 v2.12.6
 	github.com/nats-io/nats.go v1.49.0
 	github.com/oklog/run v1.2.0
 	github.com/olekukonko/tablewriter v1.1.4
@@ -304,7 +304,7 @@ require (
 	github.com/morikuni/aec v1.0.0 // indirect
 	github.com/mschoch/smat v0.2.0 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
-	github.com/nats-io/jwt/v2 v2.8.0 // indirect
+	github.com/nats-io/jwt/v2 v2.8.1 // indirect
 	github.com/nats-io/nkeys v0.4.15 // indirect
 	github.com/nats-io/nuid v1.0.1 // indirect
 	github.com/nxadm/tail v1.4.8 // indirect