[maven] Bump flogger.version from 0.7.4 to 0.8

Bumps `flogger.version` from 0.7.4 to 0.8.

Updates `com.google.flogger:flogger` from 0.7.4 to 0.8
- [Release notes](https://github.com/google/flogger/releases)
- [Commits](google/flogger@flogger-0.7.4...flogger-0.8)

Updates `com.google.flogger:flogger-slf4j-backend` from 0.7.4 to 0.8
- [Release notes](https://github.com/google/flogger/releases)
- [Commits](google/flogger@flogger-0.7.4...flogger-0.8)

---
updated-dependencies:
- dependency-name: com.google.flogger:flogger
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: com.google.flogger:flogger-slf4j-backend
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

pom.xml

@@ -49,7 +49,7 @@
     <project.build.sourceEncoding>${source.encoding}</project.build.sourceEncoding>
 
     <!-- dependencies versions -->
-    <flogger.version>0.7.4</flogger.version>
+    <flogger.version>0.8</flogger.version>
     <google-auto-service.version>1.1.1</google-auto-service.version>
     <logback.version>1.4.11</logback.version>
     <slf4j.version>2.0.9</slf4j.version>