(1.6.x): Bump io.projectreactor.tools:blockhound-junit-platform

Bumps [io.projectreactor.tools:blockhound-junit-platform](https://github.com/reactor/BlockHound) from 1.0.8.RELEASE to 1.0.9.RELEASE.
- [Release notes](https://github.com/reactor/BlockHound/releases)
- [Commits](reactor/BlockHound@1.0.8.RELEASE...1.0.9.RELEASE)

---
updated-dependencies:
- dependency-name: io.projectreactor.tools:blockhound-junit-platform
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

build.gradle

@@ -19,7 +19,7 @@ import java.util.concurrent.ConcurrentHashMap
 buildscript {
 	ext {
 		awaitilityVersion = "4.2.1"
-		blockHoundVersion = "1.0.8.RELEASE"
+		blockHoundVersion = "1.0.9.RELEASE"
 		cfJavaClientVersion = "5.10.0.RELEASE"
 		checkstyleVersion = "8.37"
 		commonsTextVersion = "1.11.0"