fix: pom.xml to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JAVA-COMGOOGLEPROTOBUF-8055227
- https://snyk.io/vuln/SNYK-JAVA-COMGOOGLEPROTOBUF-8055228
- https://snyk.io/vuln/SNYK-JAVA-COMGOOGLEGUAVA-5710356

Author: snyk-bot

pom.xml

@@ -66,7 +66,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>pubsublite-kafka</artifactId>
-      <version>1.2.1</version>
+      <version>1.2.2</version>
     </dependency>
     <dependency>
       <groupId>com.google.cloud</groupId>