deps: update dependency org.yaml:snakeyaml to v2.2 (#2160)

Author: renovate-bot

gapic-generator-java/pom.xml

@@ -436,7 +436,7 @@
     <dependency>
       <groupId>org.yaml</groupId>
       <artifactId>snakeyaml</artifactId>
-      <version>2.0</version>
+      <version>2.2</version>
     </dependency>
     <dependency>
       <groupId>com.google.googlejavaformat</groupId>