chore: bump azure-core from 1.38.0 to 1.39.0 in /examples/msal-java

Bumps [azure-core](https://github.com/Azure/azure-sdk-for-java) from 1.38.0 to 1.39.0.
- [Release notes](https://github.com/Azure/azure-sdk-for-java/releases)
- [Commits](Azure/azure-sdk-for-java@azure-core_1.38.0...azure-core_1.39.0)

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

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

examples/msal-java/pom.xml

@@ -31,7 +31,7 @@
     <dependency>
       <groupId>com.azure</groupId>
       <artifactId>azure-core</artifactId>
-      <version>1.38.0</version>
+      <version>1.39.0</version>
     </dependency>
     <dependency>
       <groupId>com.microsoft.azure</groupId>