[chore][extension/awscloudwatchmetricstreams_encoding] Update codeowners (open-telemetry#38789)

<!--Ex. Fixing a bug - Describe the bug and how this fixes the issue.
Ex. Adding a feature - Explain what this achieves.-->
#### Description

Update codeowners.

Work done:
- PRs reviewed / authored:
-
open-telemetry#38419
-
open-telemetry#38516
-
open-telemetry#38605
- Issues responded to:
-
open-telemetry#37870

<!-- Issue number (e.g. open-telemetry#1234) or full URL to issue, if applicable. -->
#### Link to tracking issue
N/A


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

N/A

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

N/A

Author: constanca-m

.github/CODEOWNERS

@@ -93,7 +93,7 @@ extension/bearertokenauthextension/                              @open-telemetry
 extension/cgroupruntimeextension/                                @open-telemetry/collector-contrib-approvers @mx-psi @rogercoll
 extension/encoding/                                              @open-telemetry/collector-contrib-approvers @atoulme @dao-jun @dmitryax @MovieStoreGuy @VihasMakwana
 extension/encoding/avrologencodingextension/                     @open-telemetry/collector-contrib-approvers @thmshmm
-extension/encoding/awscloudwatchmetricstreamsencodingextension/  @open-telemetry/collector-contrib-approvers @axw
+extension/encoding/awscloudwatchmetricstreamsencodingextension/  @open-telemetry/collector-contrib-approvers @axw @constanca-m
 extension/encoding/googlecloudlogentryencodingextension/         @open-telemetry/collector-contrib-approvers @alexvanboxel
 extension/encoding/jaegerencodingextension/                      @open-telemetry/collector-contrib-approvers @MovieStoreGuy @atoulme
 extension/encoding/jsonlogencodingextension/                     @open-telemetry/collector-contrib-approvers @VihasMakwana @atoulme

extension/encoding/awscloudwatchmetricstreamsencodingextension/README.md

@@ -6,7 +6,7 @@
 | Stability     | [alpha]  |
 | Distributions | [contrib] |
 | Issues        | [![Open issues](https://img.shields.io/github/issues-search/open-telemetry/opentelemetry-collector-contrib?query=is%3Aissue%20is%3Aopen%20label%3Aextension%2Fawscloudwatchmetricstreamsencoding%20&label=open&color=orange&logo=opentelemetry)](https://github.com/open-telemetry/opentelemetry-collector-contrib/issues?q=is%3Aopen+is%3Aissue+label%3Aextension%2Fawscloudwatchmetricstreamsencoding) [![Closed issues](https://img.shields.io/github/issues-search/open-telemetry/opentelemetry-collector-contrib?query=is%3Aissue%20is%3Aclosed%20label%3Aextension%2Fawscloudwatchmetricstreamsencoding%20&label=closed&color=blue&logo=opentelemetry)](https://github.com/open-telemetry/opentelemetry-collector-contrib/issues?q=is%3Aclosed+is%3Aissue+label%3Aextension%2Fawscloudwatchmetricstreamsencoding) |
-| [Code Owners](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/CONTRIBUTING.md#becoming-a-code-owner)    | [@axw](https://www.github.com/axw) |
+| [Code Owners](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/CONTRIBUTING.md#becoming-a-code-owner)    | [@axw](https://www.github.com/axw), [@constanca-m](https://www.github.com/constanca-m) |
 
 [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

extension/encoding/awscloudwatchmetricstreamsencodingextension/metadata.yaml

@@ -6,7 +6,7 @@ status:
     alpha: [extension]
   distributions: [contrib]
   codeowners:
-    active: [axw]
+    active: [axw, constanca-m]
 
 tests:
   config: