Bump com.google.guava:guava in the java-production-dependencies group

Bumps the java-production-dependencies group with 1 update: [com.google.guava:guava](https://github.com/google/guava).


Updates `com.google.guava:guava` from 33.3.1-jre to 33.4.0-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
  dependency-group: java-production-dependencies
...

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

Author: dependabot[bot]

pom.xml

@@ -51,7 +51,7 @@
     <!-- runtime dependencies -->
     <api.version>1.4.0</api.version>
     <keepassxc-proxy.version>1.2.7</keepassxc-proxy.version>
-    <guava.version>33.3.1-jre</guava.version>
+    <guava.version>33.4.0-jre</guava.version>
     <slf4j.version>2.0.16</slf4j.version>
     <junit.version>5.11.3</junit.version>
   </properties>