Bump truth-proto-extension from 1.1 to 1.1.5 (#580)

Bumps truth-proto-extension from 1.1 to 1.1.5.

---
updated-dependencies:
- dependency-name: com.google.truth.extensions:truth-proto-extension
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

formats/protobuf/pom.xml

@@ -112,7 +112,7 @@
         <dependency>
             <groupId>com.google.truth.extensions</groupId>
             <artifactId>truth-proto-extension</artifactId>
-            <version>1.1</version>
+            <version>1.1.5</version>
             <scope>test</scope>
         </dependency>