Bump com.azure:azure-core-http-netty in /plugins/repository-azure

Bumps [com.azure:azure-core-http-netty](https://github.com/Azure/azure-sdk-for-java) from 1.15.1 to 1.15.3.
- [Release notes](https://github.com/Azure/azure-sdk-for-java/releases)
- [Commits](Azure/azure-sdk-for-java@azure-core-http-netty_1.15.1...azure-core-http-netty_1.15.3)

---
updated-dependencies:
- dependency-name: com.azure:azure-core-http-netty
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

plugins/repository-azure/build.gradle

@@ -48,7 +48,7 @@ dependencies {
  api 'com.azure:azure-json:1.1.0'
  api 'com.azure:azure-xml:1.1.0'
  api 'com.azure:azure-storage-common:12.25.1'
- api 'com.azure:azure-core-http-netty:1.15.1'
+ api 'com.azure:azure-core-http-netty:1.15.3'
  api "io.netty:netty-codec-dns:${versions.netty}"
  api "io.netty:netty-codec-socks:${versions.netty}"
  api "io.netty:netty-codec-http2:${versions.netty}"