deps: update dependency gcp-releasetool to v1.8.9 (#128)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| gcp-releasetool | `==1.8.7` -> `==1.8.9` | [![age](https://badges.renovateapi.com/packages/pypi/gcp-releasetool/1.8.9/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/pypi/gcp-releasetool/1.8.9/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/pypi/gcp-releasetool/1.8.9/compatibility-slim/1.8.7)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/pypi/gcp-releasetool/1.8.9/confidence-slim/1.8.7)](https://docs.renovatebot.com/merge-confidence/) |

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java-video-live-stream/README.md

@@ -22,20 +22,20 @@ If you are using Maven, add this to your pom.xml file:
 <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-live-stream</artifactId>
-  <version>0.5.4</version>
+  <version>0.5.5</version>
 </dependency>
 ```
 
 If you are using Gradle without BOM, add this to your dependencies:
 
 ```Groovy
-implementation 'com.google.cloud:google-cloud-live-stream:0.5.4'
+implementation 'com.google.cloud:google-cloud-live-stream:0.5.5'
 ```
 
 If you are using SBT, add this to your dependencies:
 
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-live-stream" % "0.5.4"
+libraryDependencies += "com.google.cloud" % "google-cloud-live-stream" % "0.5.5"
 ```
 
 ## Authentication