build(deps): bump io.projectreactor.netty:reactor-netty-http (#242)

Bumps [io.projectreactor.netty:reactor-netty-http](https://github.com/reactor/reactor-netty) from 1.2.8 to 1.2.9.
- [Release notes](https://github.com/reactor/reactor-netty/releases)
- [Commits](reactor/reactor-netty@v1.2.8...v1.2.9)

---
updated-dependencies:
- dependency-name: io.projectreactor.netty:reactor-netty-http
  dependency-version: 1.2.9
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Patrick Boos <patrick.boos@getyourguide.com>

Author: dependabot[bot]

build.gradle

@@ -78,7 +78,7 @@ subprojects {
             implementation("org.apache.commons:commons-lang3:3.18.0") {
                 because("versions below 3.18.0 have security vulnerabilities including CVE-2025-48924 - see dependabot #15")
             }
-            implementation("io.projectreactor.netty:reactor-netty-http:1.2.8") {
+            implementation("io.projectreactor.netty:reactor-netty-http:1.2.9") {
                 because("versions below 1.2.8 have security vulnerabilities including CVE-2025-22227 - see dependabot #16")
             }
         }