build(deps): bump azure-identity from 1.6.0 to 1.8.1

Bumps [azure-identity](https://github.com/Azure/azure-sdk-for-java) from 1.6.0 to 1.8.1.
- [Release notes](https://github.com/Azure/azure-sdk-for-java/releases)
- [Commits](Azure/azure-sdk-for-java@azure-core_1.6.0...azure-core_1.8.1)

---
updated-dependencies:
- dependency-name: com.azure:azure-identity
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

connect-file-pulse-filesystems/filepulse-azure-storage-fs/pom.xml

@@ -18,7 +18,7 @@
     <properties>
         <checkstyle.config.location>${project.parent.basedir}/..</checkstyle.config.location>
         <azure.storage.blob.version>12.21.0</azure.storage.blob.version>
-        <azure.identity.version>1.6.0</azure.identity.version>
+        <azure.identity.version>1.8.1</azure.identity.version>
         <azure.storage.file.datalake>12.4.1</azure.storage.file.datalake>
         <azure.stora.version>1.2.5</azure.stora.version>
     </properties>