chore(deps): bump github.com/libp2p/go-libp2p-pubsub

Bumps [github.com/libp2p/go-libp2p-pubsub](https://github.com/libp2p/go-libp2p-pubsub) from 0.14.2 to 0.15.0.
- [Release notes](https://github.com/libp2p/go-libp2p-pubsub/releases)
- [Commits](libp2p/go-libp2p-pubsub@v0.14.2...v0.15.0)

---
updated-dependencies:
- dependency-name: github.com/libp2p/go-libp2p-pubsub
  dependency-version: 0.15.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

go.mod

@@ -17,7 +17,7 @@ require (
 	github.com/labstack/echo/v4 v4.13.3
 	github.com/libp2p/go-libp2p v0.45.0
 	github.com/libp2p/go-libp2p-kad-dht v0.36.0
-	github.com/libp2p/go-libp2p-pubsub v0.14.2
+	github.com/libp2p/go-libp2p-pubsub v0.15.0
 	github.com/miekg/dns v1.1.68
 	github.com/mudler/go-processmanager v0.0.0-20240820160718-8b802d3ecf82
 	github.com/mudler/water v0.0.0-20250808092830-dd90dcf09025