Upgrade grafana-plugin-sdk-go (deps): Bump github.com/grafana/grafana-plugin-sdk-go

Bumps [github.com/grafana/grafana-plugin-sdk-go](https://github.com/grafana/grafana-plugin-sdk-go) from 0.250.0 to 0.251.0.
- [Release notes](https://github.com/grafana/grafana-plugin-sdk-go/releases)
- [Commits](https://github.com/grafana/grafana-plugin-sdk-go/compare/v0.250.0...v0.251.0)

---
updated-dependencies:
- dependency-name: github.com/grafana/grafana-plugin-sdk-go
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

go.mod

@@ -5,7 +5,7 @@ go 1.22.1
 require (
 	github.com/bitly/go-simplejson v0.5.1
 	github.com/dlclark/regexp2 v1.10.0
-	github.com/grafana/grafana-plugin-sdk-go v0.250.0
+	github.com/grafana/grafana-plugin-sdk-go v0.251.0
 	github.com/patrickmn/go-cache v2.1.0+incompatible
 	github.com/prometheus/client_golang v1.20.3
 	github.com/stretchr/testify v1.9.0