deps: update dependency com.fasterxml.jackson.core:jackson-core to v2.12.1 (#770)

Author: renovate-bot

pom.xml

@@ -64,7 +64,7 @@
     <project.protobuf-java.version>3.11.4</project.protobuf-java.version>
     <github.global.server>github</github.global.server>
     <site.installationModule>google-cloud-bigquerystorage-parent</site.installationModule>
-    <jackson-core.version>2.12.0</jackson-core.version>
+    <jackson-core.version>2.12.1</jackson-core.version>
   </properties>
 
   <pluginRepositories>