[receiver/azuremonitorreceiver] Add celian-garcia as code owner (#37750)

<!--Ex. Fixing a bug - Describe the bug and how this fixes the issue.
Ex. Adding a feature - Explain what this achieves.-->
#### Description
Proposing myself as a maintainer of this code. 
My membership has been sponsored on that purpose by @atoulme and @mx-psi
open-telemetry/community#2508

ping also the current code owner @nslaughter

<!-- Issue number (e.g. #1234) or full URL to issue, if applicable. -->
#### Link to tracking issue
Fixes #37713

<!--Describe what testing was performed and which tests were added.-->
#### Testing

<!--Describe the documentation added.-->
#### Documentation

<!--Please delete paragraphs that you did not use before submitting.-->

Signed-off-by: Célian Garcia <[email protected]>
Co-authored-by: Curtis Robert <[email protected]>

.github/CODEOWNERS

@@ -203,7 +203,7 @@ receiver/awss3receiver/                                          @open-telemetry
 receiver/awsxrayreceiver/                                        @open-telemetry/collector-contrib-approvers @wangzlei @srprash
 receiver/azureblobreceiver/                                      @open-telemetry/collector-contrib-approvers @eedorenko @mx-psi
 receiver/azureeventhubreceiver/                                  @open-telemetry/collector-contrib-approvers @atoulme @cparkins
-receiver/azuremonitorreceiver/                                   @open-telemetry/collector-contrib-approvers @nslaughter
+receiver/azuremonitorreceiver/                                   @open-telemetry/collector-contrib-approvers @nslaughter @celian-garcia
 receiver/bigipreceiver/                                          @open-telemetry/collector-contrib-approvers @StefanKurek
 receiver/carbonreceiver/                                         @open-telemetry/collector-contrib-approvers @aboguszewski-sumo
 receiver/chronyreceiver/                                         @open-telemetry/collector-contrib-approvers @MovieStoreGuy @jamesmoessis

receiver/azuremonitorreceiver/README.md

@@ -6,7 +6,7 @@
 | Stability     | [alpha]: metrics   |
 | Distributions | [contrib] |
 | Issues        | [![Open issues](https://img.shields.io/github/issues-search/open-telemetry/opentelemetry-collector-contrib?query=is%3Aissue%20is%3Aopen%20label%3Areceiver%2Fazuremonitor%20&label=open&color=orange&logo=opentelemetry)](https://github.com/open-telemetry/opentelemetry-collector-contrib/issues?q=is%3Aopen+is%3Aissue+label%3Areceiver%2Fazuremonitor) [![Closed issues](https://img.shields.io/github/issues-search/open-telemetry/opentelemetry-collector-contrib?query=is%3Aissue%20is%3Aclosed%20label%3Areceiver%2Fazuremonitor%20&label=closed&color=blue&logo=opentelemetry)](https://github.com/open-telemetry/opentelemetry-collector-contrib/issues?q=is%3Aclosed+is%3Aissue+label%3Areceiver%2Fazuremonitor) |
-| [Code Owners](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/CONTRIBUTING.md#becoming-a-code-owner)    | [@nslaughter](https://www.github.com/nslaughter) |
+| [Code Owners](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/CONTRIBUTING.md#becoming-a-code-owner)    | [@nslaughter](https://www.github.com/nslaughter), [@celian-garcia](https://www.github.com/celian-garcia) |
 
 [alpha]: https://github.com/open-telemetry/opentelemetry-collector/blob/main/docs/component-stability.md#alpha
 [contrib]: https://github.com/open-telemetry/opentelemetry-collector-releases/tree/main/distributions/otelcol-contrib

receiver/azuremonitorreceiver/metadata.yaml

@@ -6,7 +6,7 @@ status:
     alpha: [metrics]
   distributions: [contrib]
   codeowners:
-    active: [nslaughter]
+    active: [nslaughter, celian-garcia]
 
 resource_attributes:
   azuremonitor.tenant_id: