Bump com.google.guava:guava in /apps/backend (#870)

Bumps [com.google.guava:guava](https://github.com/google/guava) from 33.2.1-jre to 33.3.0-jre.
- [Release notes](https://github.com/google/guava/releases)
- [Commits](https://github.com/google/guava/commits)

---
updated-dependencies:
- dependency-name: com.google.guava:guava
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

apps/backend/pom.xml

@@ -36,7 +36,7 @@
         <!-- transitive versions -->
         <commons-compress.version>1.27.0</commons-compress.version>
         <commons-io.version>2.16.1</commons-io.version>
-        <guava.version>33.2.1-jre</guava.version>
+        <guava.version>33.3.0-jre</guava.version>
         <jna.version>5.14.0</jna.version>
         <jetbrains.annotation.version>24.1.0</jetbrains.annotation.version>
         <stax2-api.version>4.2.2</stax2-api.version>