deps: update dependency com.google.auth:google-auth-library-oauth2-ht…

…tp to v1.8.0 (#511)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.auth:google-auth-library-oauth2-http](https://togithub.com/googleapis/google-auth-library-java) | `1.7.0` -> `1.8.0` | [![age](https://badges.renovateapi.com/packages/maven/com.google.auth:google-auth-library-oauth2-http/1.8.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.auth:google-auth-library-oauth2-http/1.8.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.auth:google-auth-library-oauth2-http/1.8.0/compatibility-slim/1.7.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.auth:google-auth-library-oauth2-http/1.8.0/confidence-slim/1.7.0)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

<details>
<summary>googleapis/google-auth-library-java</summary>

### [`v1.8.0`](https://togithub.com/googleapis/google-auth-library-java/blob/HEAD/CHANGELOG.md#&#8203;180-httpsgithubcomgoogleapisgoogle-auth-library-javacomparev170v180-2022-06-27)

[Compare Source](https://togithub.com/googleapis/google-auth-library-java/compare/v1.7.0...v1.8.0)

##### Features

-   add build scripts for native image testing in Java 17 ([#&#8203;1440](https://togithub.com/googleapis/google-auth-library-java/issues/1440)) ([#&#8203;923](https://togithub.com/googleapis/google-auth-library-java/issues/923)) ([bbb51ce](https://togithub.com/googleapis/google-auth-library-java/commit/bbb51ce7a9265cb991739cd90e1ccf65675d05dc))
-   Adds Pluggable Auth support (WIF) ([#&#8203;908](https://togithub.com/googleapis/google-auth-library-java/issues/908)) ([c3e8d16](https://togithub.com/googleapis/google-auth-library-java/commit/c3e8d169704943735c6b3df7bd0187f04fdd9aa5))

##### Documentation

-   updates README for Pluggable Auth  ([#&#8203;921](https://togithub.com/googleapis/google-auth-library-java/issues/921)) ([23716b8](https://togithub.com/googleapis/google-auth-library-java/commit/23716b82fb3000f5210bb5604127aad7ef52cb76))

</details>

---

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samples/install-without-bom/pom.xml

@@ -35,7 +35,7 @@
     <dependency>
       <groupId>com.google.auth</groupId>
       <artifactId>google-auth-library-oauth2-http</artifactId>
-      <version>1.7.0</version>
+      <version>1.8.0</version>
     </dependency>
 
     <dependency>