deps: update dependency io.grafeas:grafeas to v2.2.4 (#204)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [io.grafeas:grafeas](https://togithub.com/googleapis/java-grafeas) | `2.2.3` -> `2.2.4` | [![age](https://badges.renovateapi.com/packages/maven/io.grafeas:grafeas/2.2.4/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/io.grafeas:grafeas/2.2.4/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/io.grafeas:grafeas/2.2.4/compatibility-slim/2.2.3)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/io.grafeas:grafeas/2.2.4/confidence-slim/2.2.3)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>googleapis/java-grafeas</summary>

### [`v2.2.4`](https://togithub.com/googleapis/java-grafeas/blob/HEAD/CHANGELOG.md#&#8203;224-httpsgithubcomgoogleapisjava-grafeascomparev223v224-2022-04-15)

[Compare Source](https://togithub.com/googleapis/java-grafeas/compare/v2.2.3...v2.2.4)

</details>

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Author: renovate-bot

README.md

@@ -19,20 +19,20 @@ If you are using Maven, add this to your pom.xml file:
 <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-binary-authorization</artifactId>
-  <version>1.0.7</version>
+  <version>1.0.8</version>
 </dependency>
 ```
 
 If you are using Gradle without BOM, add this to your dependencies
 
 ```Groovy
-implementation 'com.google.cloud:google-cloud-binary-authorization:1.0.7'
+implementation 'com.google.cloud:google-cloud-binary-authorization:1.0.8'
 ```
 
 If you are using SBT, add this to your dependencies
 
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-binary-authorization" % "1.0.7"
+libraryDependencies += "com.google.cloud" % "google-cloud-binary-authorization" % "1.0.8"
 ```
 
 ## Authentication

pom.xml

@@ -86,7 +86,7 @@
       <dependency>
         <groupId>io.grafeas</groupId>
         <artifactId>grafeas</artifactId>
-        <version>2.2.3</version>
+        <version>2.2.4</version>
       </dependency>
 
       <dependency>