deps: update dependency com.google.truth.extensions:truth-proto-extension to v1.4.4 (#2282)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.truth.extensions:truth-proto-extension](https://togithub.com/google/truth) | `1.4.3` -> `1.4.4` | [![age](https://developer.mend.io/api/mc/badges/age/maven/com.google.truth.extensions:truth-proto-extension/1.4.4?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://developer.mend.io/api/mc/badges/adoption/maven/com.google.truth.extensions:truth-proto-extension/1.4.4?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://developer.mend.io/api/mc/badges/compatibility/maven/com.google.truth.extensions:truth-proto-extension/1.4.3/1.4.4?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/maven/com.google.truth.extensions:truth-proto-extension/1.4.3/1.4.4?slim=true)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>google/truth (com.google.truth.extensions:truth-proto-extension)</summary>

### [`v1.4.4`](https://togithub.com/google/truth/releases/tag/v1.4.4)

[Compare Source](https://togithub.com/google/truth/compare/v1.4.3...v1.4.4)

-   Annotated the rest of the main package for nullness, and moved the `@NullMarked` annotation from individual classes up to the package to avoid [a warning under `--release 8`](https://togithub.com/google/truth/issues/1320). ([`e107aea`](https://togithub.com/google/truth/commit/e107aeadc))
-   Improved the failure message for `matches` to conditionally suggest using `containsMatch`. ([`7e9fc7a`](https://togithub.com/google/truth/commit/7e9fc7aec))

</details>

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Author: renovate-bot

pom.xml

@@ -189,7 +189,7 @@
             <dependency>
                 <groupId>com.google.truth.extensions</groupId>
                 <artifactId>truth-proto-extension</artifactId>
-                <version>1.4.3</version>
+                <version>1.4.4</version>
                 <scope>test</scope>
                 <exclusions>
                     <!-- exclude protobuf-java as it is managed in the shared deps bom-->