Release v0.21.0

* Add an option to log multihttp responses (#550)
* Update to grafana-build-tools v0.6.0
* Chore(deps): Bump golang.org/x/net from 0.20.0 to 0.21.0
* Chore(deps): Bump github.com/rs/zerolog from 1.31.0 to 1.32.0
* Chore(deps): Bump github.com/miekg/dns from 1.1.57 to 1.1.58
* Fix: add test for HTTP check with a long URL
* Add tenant label limits (#581)
* Release v0.20.0 (#613)
* Fix global tenant id usage for label limits query
* Release v0.20.1
* Feature: promote adhoc to permanent feature (#615)
* Update release script (#617)
* Chore(deps): Bump github.com/mccutchen/go-httpbin/v2 (#618)
* Fix: missing http check regex validations (#612)
* Release v0.20.2 (#620)
* Chore(deps): Bump github.com/mccutchen/go-httpbin/v2 (#626)
* change the name of the k6 check type to scripted (#622)
* Chore(deps): Bump github.com/prometheus/client_model from 0.5.0 to 0.6.0
* Chore(deps): Bump google.golang.org/grpc from 1.61.0 to 1.61.1
* Chore(deps): Bump github.com/prometheus/common from 0.46.0 to 0.47.0
* Chore(deps): Bump github.com/prometheus/prometheus from 0.49.1 to 0.50.0
* Add header to ease tracking HTTP requests (#624)
* Add telemetry protobuf definitions (#627)

Signed-off-by: ka3de <danijs12@hotmail.com>

CHANGELOG.md

@@ -2,8 +2,8 @@
 ## [Unreleased]
 
 
-<a name="v0.20.2"></a>
-## [v0.20.2] - 2024-02-13
+<a name="v0.21.0"></a>
+## [v0.21.0] - 2024-02-26
 ### Feature
 - promote adhoc to permanent feature ([#615](https://github.com/grafana/synthetic-monitoring-agent/issues/615))
 
@@ -554,8 +554,8 @@
 <a name="v0.0.1"></a>
 ## v0.0.1 - 2020-06-24
 
-[Unreleased]: https://github.com/grafana/synthetic-monitoring-agent/compare/v0.20.2...HEAD
-[v0.20.2]: https://github.com/grafana/synthetic-monitoring-agent/compare/v0.20.1...v0.20.2
+[Unreleased]: https://github.com/grafana/synthetic-monitoring-agent/compare/v0.21.0...HEAD
+[v0.21.0]: https://github.com/grafana/synthetic-monitoring-agent/compare/v0.20.1...v0.21.0
 [v0.20.1]: https://github.com/grafana/synthetic-monitoring-agent/compare/v0.19.6...v0.20.1
 [v0.19.6]: https://github.com/grafana/synthetic-monitoring-agent/compare/v0.19.5...v0.19.6
 [v0.19.5]: https://github.com/grafana/synthetic-monitoring-agent/compare/v0.19.4...v0.19.5