chore: bump com.microsoft.azure:msal4j in /examples/msal-java

Bumps [com.microsoft.azure:msal4j](https://github.com/AzureAD/microsoft-authentication-library-for-java) from 1.14.2 to 1.15.1.
- [Release notes](https://github.com/AzureAD/microsoft-authentication-library-for-java/releases)
- [Changelog](https://github.com/AzureAD/microsoft-authentication-library-for-java/blob/dev/changelog.txt)
- [Commits](https://github.com/AzureAD/microsoft-authentication-library-for-java/compare/v1.14.2...v1.15.1)

---
updated-dependencies:
- dependency-name: com.microsoft.azure:msal4j
  dependency-type: direct:production
...

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

examples/msal-java/pom.xml

@@ -36,7 +36,7 @@
     <dependency>
       <groupId>com.microsoft.azure</groupId>
       <artifactId>msal4j</artifactId>
-      <version>1.14.2</version>
+      <version>1.15.1</version>
     </dependency>
     <!-- in a real application, you would use a proper logging implementation such as log4j2 or logback -->
     <dependency>