feat: Add Grafana Labs as adopter (#3075)

Signed-off-by: Dave Henderson <[email protected]>

Author: hairyhenderson

ADOPTERS.md

@@ -13,5 +13,6 @@ Thank you for trusting the `go-feature-flag` and using it in your organization.
 | Stacklok             | https://github.com/stacklok/                          | Feature flags (looking at using relay)         |
 | HelloWorldCS         | https://helloworldcs.org                              | Feature flags for internal tools + app         |
 | Alternative Payments | https://www.alternativepayments.io                    | Feature Flagging for frontend and backend apps |
-| Mecena               | https://mecena.co                                     | FF for backend microservices                   | 
-| LandsEnd             | https://www.landsend.com                              | FF for backend and frontend apps               | 
+| Mecena               | https://mecena.co                                     | FF for backend microservices                   |
+| LandsEnd             | https://www.landsend.com                              | FF for backend and frontend apps               |
+| Grafana Labs         | https://grafana.com                                   | GOFF relay with OpenFeature clients            |