deps: update dependency com.google.cloud:google-cloud-shared-dependencies to v2.8.0 (#1876)

Author: renovate-bot

pom.xml

@@ -54,7 +54,7 @@
     <github.global.server>github</github.global.server>
     <site.installationModule>google-cloud-bigquery-parent</site.installationModule>
     <google-api-services-bigquery.version>v2-rev20220220-1.32.1</google-api-services-bigquery.version>
-    <google.cloud.shared-dependencies.version>2.7.0</google.cloud.shared-dependencies.version>
+    <google.cloud.shared-dependencies.version>2.8.0</google.cloud.shared-dependencies.version>
   </properties>
 
   <dependencyManagement>