Bump okhttp from 4.4.1 to 4.8.0

Bumps [okhttp](https://github.com/square/okhttp) from 4.4.1 to 4.8.0.
- [Release notes](https://github.com/square/okhttp/releases)
- [Changelog](https://github.com/square/okhttp/blob/master/CHANGELOG.md)
- [Commits](square/okhttp@parent-4.4.1...parent-4.8.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

logbook-okhttp/pom.xml

@@ -21,7 +21,7 @@
         <dependency>
             <groupId>com.squareup.okhttp3</groupId>
             <artifactId>okhttp</artifactId>
-            <version>4.4.1</version>
+            <version>4.8.0</version>
         </dependency>
         <!-- https://nvd.nist.gov/vuln/detail/CVE-2019-10101 -->
         <dependency>