Bump quarkus-github-app.version from 2.8.3 to 2.8.4

Bumps `quarkus-github-app.version` from 2.8.3 to 2.8.4.

Updates `io.quarkiverse.githubapp:quarkus-github-app` from 2.8.3 to 2.8.4
- [Release notes](https://github.com/quarkiverse/quarkus-github-app/releases)
- [Commits](quarkiverse/quarkus-github-app@2.8.3...2.8.4)

Updates `io.quarkiverse.githubapp:quarkus-github-app-testing` from 2.8.3 to 2.8.4
- [Release notes](https://github.com/quarkiverse/quarkus-github-app/releases)
- [Commits](quarkiverse/quarkus-github-app@2.8.3...2.8.4)

---
updated-dependencies:
- dependency-name: io.quarkiverse.githubapp:quarkus-github-app
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: io.quarkiverse.githubapp:quarkus-github-app-testing
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

pom.xml

@@ -61,7 +61,7 @@
         <!-- Quarkus -->
         <quarkus.platform.artifact-id>quarkus-bom</quarkus.platform.artifact-id>
         <quarkus.platform.group-id>io.quarkus.platform</quarkus.platform.group-id>
-        <quarkus-github-app.version>2.8.3</quarkus-github-app.version>
+        <quarkus-github-app.version>2.8.4</quarkus-github-app.version>
         <quarkus.platform.version>3.18.2</quarkus.platform.version>
         <quarkus.mailpit.version>1.3.0</quarkus.mailpit.version>
         <!-- Libraries -->