deps: update dependency com.google.cloud:google-cloud-shared-dependencies to v3.20.0 (#3019)

Author: renovate-bot

pom.xml

@@ -55,7 +55,7 @@
     <github.global.server>github</github.global.server>
     <site.installationModule>google-cloud-bigquery-parent</site.installationModule>
     <google-api-services-bigquery.version>v2-rev20231111-2.0.0</google-api-services-bigquery.version>
-    <google.cloud.shared-dependencies.version>3.19.0</google.cloud.shared-dependencies.version>
+    <google.cloud.shared-dependencies.version>3.20.0</google.cloud.shared-dependencies.version>
     <arrow.version>14.0.1</arrow.version>
   </properties>