deps: update autovalue.version to v1.7.2 (#306)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [com.google.auto.value:auto-value-annotations](https://github.com/google/auto) | patch | `1.7.1` -> `1.7.2` |
| [com.google.auto.value:auto-value](https://github.com/google/auto) | patch | `1.7.1` -> `1.7.2` |

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google-cloud-bigtable-deps-bom/pom.xml

@@ -71,7 +71,7 @@
   </licenses>
 
   <properties>
-    <autovalue.version>1.7.1</autovalue.version>
+    <autovalue.version>1.7.2</autovalue.version>
     <!-- when updating, make sure to align the versions of transitive deps below -->
     <gax.version>1.56.0</gax.version>
     <google.api-common.version>1.9.0</google.api-common.version>