Added @nsj07 as code owner for spanner receiver component (#40366)

<!--Ex. Fixing a bug - Describe the bug and how this fixes the issue.
Ex. Adding a feature - Explain what this achieves.-->
#### Description
Adding @nsj07 as code owner for google spanner receiver component

Author: nsj07

.github/CODEOWNERS

@@ -244,7 +244,7 @@ receiver/githubreceiver/                                         @open-telemetry
 receiver/gitlabreceiver/                                         @open-telemetry/collector-contrib-approvers @adrielp @atoulme
 receiver/googlecloudmonitoringreceiver/                          @open-telemetry/collector-contrib-approvers @dashpole @TylerHelmuth
 receiver/googlecloudpubsubreceiver/                              @open-telemetry/collector-contrib-approvers @alexvanboxel
-receiver/googlecloudspannerreceiver/                             @open-telemetry/collector-contrib-approvers @dashpole @KiranmayiB
+receiver/googlecloudspannerreceiver/                             @open-telemetry/collector-contrib-approvers @dashpole @KiranmayiB @nsj07
 receiver/haproxyreceiver/                                        @open-telemetry/collector-contrib-approvers @atoulme @MovieStoreGuy
 receiver/hostmetricsreceiver/                                    @open-telemetry/collector-contrib-approvers @dmitryax @braydonk
 receiver/hostmetricsreceiver/internal/scraper/cpuscraper/        @open-telemetry/collector-contrib-approvers @dmitryax @braydonk

receiver/googlecloudspannerreceiver/README.md

@@ -7,7 +7,7 @@
 | Distributions | [contrib] |
 | Issues        | [![Open issues](https://img.shields.io/github/issues-search/open-telemetry/opentelemetry-collector-contrib?query=is%3Aissue%20is%3Aopen%20label%3Areceiver%2Fgooglecloudspanner%20&label=open&color=orange&logo=opentelemetry)](https://github.com/open-telemetry/opentelemetry-collector-contrib/issues?q=is%3Aopen+is%3Aissue+label%3Areceiver%2Fgooglecloudspanner) [![Closed issues](https://img.shields.io/github/issues-search/open-telemetry/opentelemetry-collector-contrib?query=is%3Aissue%20is%3Aclosed%20label%3Areceiver%2Fgooglecloudspanner%20&label=closed&color=blue&logo=opentelemetry)](https://github.com/open-telemetry/opentelemetry-collector-contrib/issues?q=is%3Aclosed+is%3Aissue+label%3Areceiver%2Fgooglecloudspanner) |
 | Code coverage | [![codecov](https://codecov.io/github/open-telemetry/opentelemetry-collector-contrib/graph/main/badge.svg?component=receiver_googlecloudspanner)](https://app.codecov.io/gh/open-telemetry/opentelemetry-collector-contrib/tree/main/?components%5B0%5D=receiver_googlecloudspanner&displayType=list) |
-| [Code Owners](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/CONTRIBUTING.md#becoming-a-code-owner)    | [@dashpole](https://www.github.com/dashpole), [@KiranmayiB](https://www.github.com/KiranmayiB) |
+| [Code Owners](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/CONTRIBUTING.md#becoming-a-code-owner)    | [@dashpole](https://www.github.com/dashpole), [@KiranmayiB](https://www.github.com/KiranmayiB), [@nsj07](https://www.github.com/nsj07) |
 | Emeritus      | [@architjugran](https://www.github.com/architjugran), [@varunraiko](https://www.github.com/varunraiko), [@harishbohara11](https://www.github.com/harishbohara11), [@dsimil](https://www.github.com/dsimil) |
 
 [beta]: https://github.com/open-telemetry/opentelemetry-collector/blob/main/docs/component-stability.md#beta

receiver/googlecloudspannerreceiver/metadata.yaml

@@ -6,7 +6,7 @@ status:
     beta: [metrics]
   distributions: [contrib]
   codeowners:
-    active: [dashpole, KiranmayiB]
+    active: [dashpole, KiranmayiB, nsj07]
     emeritus: [architjugran, varunraiko, harishbohara11, dsimil]
 tests:
   config: