go.mod: bump github.com/bufbuild/buf from 1.25.1 to 1.26.1

Bumps [github.com/bufbuild/buf](https://github.com/bufbuild/buf) from 1.25.1 to 1.26.1.
- [Release notes](https://github.com/bufbuild/buf/releases)
- [Changelog](https://github.com/bufbuild/buf/blob/main/CHANGELOG.md)
- [Commits](bufbuild/buf@v1.25.1...v1.26.1)

---
updated-dependencies:
- dependency-name: github.com/bufbuild/buf
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

go.mod

@@ -3,7 +3,7 @@ module github.com/conduitio/conduit-connector-protocol
 go 1.20
 
 require (
-	github.com/bufbuild/buf v1.25.1
+	github.com/bufbuild/buf v1.26.1
 	github.com/hashicorp/go-plugin v1.4.10
 	go.uber.org/mock v0.2.0
 	google.golang.org/grpc v1.57.0

go.sum

@@ -4,8 +4,8 @@ github.com/BurntSushi/toml v1.2.1/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbi
 github.com/Microsoft/go-winio v0.6.1 h1:9/kr64B9VUZrLm5YYwbGtUJnMgqWVOdUAXu6Migciow=
 github.com/Microsoft/go-winio v0.6.1/go.mod h1:LRdKpFKfdobln8UmuiYcKPot9D2v6svN5+sAH+4kjUM=
 github.com/benbjohnson/clock v1.3.5 h1:VvXlSJBzZpA/zum6Sj74hxwYI2DIxRWuNIoXAzHZz5o=
-github.com/bufbuild/buf v1.25.1 h1:8ed5AjZ+zPIJf72rxtfsDit/MtaBimaSRn9Y+5G++y0=
-github.com/bufbuild/buf v1.25.1/go.mod h1:UMPncXMWgrmIM+0QpwTEwjNr2SA0z2YIVZZsmNflvB4=
+github.com/bufbuild/buf v1.26.1 h1:+GdU4z2paCmDclnjLv7MqnVi3AGviImlIKhG0MHH9FA=
+github.com/bufbuild/buf v1.26.1/go.mod h1:UMPncXMWgrmIM+0QpwTEwjNr2SA0z2YIVZZsmNflvB4=
 github.com/bufbuild/connect-go v1.9.0 h1:JIgAeNuFpo+SUPfU19Yt5TcWlznsN5Bv10/gI/6Pjoc=
 github.com/bufbuild/connect-go v1.9.0/go.mod h1:CAIePUgkDR5pAFaylSMtNK45ANQjp9JvpluG20rhpV8=
 github.com/bufbuild/connect-opentelemetry-go v0.4.0 h1:6JAn10SNqlQ/URhvRNGrIlczKw1wEXknBUUtmWqOiak=