fix(deps): update dependency com.google.api.grpc:grpc-google-cloud-optimization-v1 to v1.1.8 (#8313)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.api.grpc:grpc-google-cloud-optimization-v1](https://togithub.com/googleapis/java-optimization/grpc-google-cloud-optimization-v1) ([source](https://togithub.com/googleapis/java-optimization)) | `1.1.8-SNAPSHOT` -> `1.1.8` | [![age](https://badges.renovateapi.com/packages/maven/com.google.api.grpc:grpc-google-cloud-optimization-v1/1.1.8/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.api.grpc:grpc-google-cloud-optimization-v1/1.1.8/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.api.grpc:grpc-google-cloud-optimization-v1/1.1.8/compatibility-slim/1.1.8-SNAPSHOT)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.api.grpc:grpc-google-cloud-optimization-v1/1.1.8/confidence-slim/1.1.8-SNAPSHOT)](https://docs.renovatebot.com/merge-confidence/) |

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java-optimization/google-cloud-optimization-bom/pom.xml

@@ -71,7 +71,7 @@
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-optimization-v1</artifactId>
-        <version>1.1.8-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-optimization-v1:current} -->
+        <version>1.1.8</version><!-- {x-version-update:grpc-google-cloud-optimization-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>

java-optimization/pom.xml

@@ -74,7 +74,7 @@
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-optimization-v1</artifactId>
-        <version>1.1.8-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-optimization-v1:current} -->
+        <version>1.1.8</version><!-- {x-version-update:grpc-google-cloud-optimization-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>