Bump com.azure:azure-identity in /samples/deviceCodeSample

Bumps [com.azure:azure-identity](https://github.com/Azure/azure-sdk-for-java) from 1.9.0 to 1.9.1.
- [Release notes](https://github.com/Azure/azure-sdk-for-java/releases)
- [Commits](Azure/azure-sdk-for-java@azure-core_1.9.0...azure-identity_1.9.1)

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

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

Author: dependabot[bot]

samples/deviceCodeSample/build.gradle

@@ -12,5 +12,5 @@ repositories {
 dependencies {
     testImplementation group: 'junit', name: 'junit', version: '4.13.2'
     implementation project(':coreLibrary')
-    implementation 'com.azure:azure-identity:1.9.0'
+    implementation 'com.azure:azure-identity:1.9.1'
 }