deps: update dependency com.google.cloud:pubsublite-beam-io to v0.19.6 (#876)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:pubsublite-beam-io](https://togithub.com/googleapis/java-shared-config) | `0.19.5` -> `0.19.6` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:pubsublite-beam-io/0.19.6/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:pubsublite-beam-io/0.19.6/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:pubsublite-beam-io/0.19.6/compatibility-slim/0.19.5)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:pubsublite-beam-io/0.19.6/confidence-slim/0.19.5)](https://docs.renovatebot.com/merge-confidence/) |

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samples/snippets/pom.xml

@@ -65,7 +65,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>pubsublite-beam-io</artifactId>
-      <version>0.19.5</version>
+      <version>0.19.6</version>
     </dependency>
 
     <dependency>