Prepare release v2.9.0-rc5

CHANGELOG.md

+## [v2.9.0-rc5](https://github.com/traefik/traefik/tree/v2.9.0-rc5) (2022-09-30)
+[All Commits](https://github.com/traefik/traefik/compare/v2.9.0-rc4...v2.9.0-rc5)
+
+**Misc:**
+- Merge current v2.8 into v2.9 ([#9400](https://github.com/traefik/traefik/pull/9400) by [ldez](https://github.com/ldez))
+
 ## [v2.8.8](https://github.com/traefik/traefik/tree/v2.8.8) (2022-09-30)
 [All Commits](https://github.com/traefik/traefik/compare/v2.8.7...v2.8.8)

script/gcg/traefik-rc-new.toml

@@ -4,11 +4,11 @@ RepositoryName = "traefik"
 OutputType = "file"
 FileName = "traefik_changelog.md"
 
-# example RC4 of v2.9.0
+# example RC5 of v2.9.0
 CurrentRef = "v2.9"
-PreviousRef = "v2.9.0-rc3"
+PreviousRef = "v2.9.0-rc4"
 BaseBranch = "v2.9"
-FutureCurrentRefName = "v2.9.0-rc4"
+FutureCurrentRefName = "v2.9.0-rc5"
 
 ThresholdPreviousRef = 10
 ThresholdCurrentRef = 10