deps: update dependency org.slf4j:slf4j-api to v1.7.31 (#719)

Author: renovate-bot

pubsublite-beam-io/pom.xml

@@ -58,7 +58,7 @@
     <dependency>
       <groupId>org.slf4j</groupId>
       <artifactId>slf4j-api</artifactId>
-      <version>1.7.30</version>
+      <version>1.7.31</version>
     </dependency>
     <dependency>
       <groupId>joda-time</groupId>