fix: pin explicit versions for okhttp-api and gson-api

The bom-2.528.x BOM does not manage okhttp-api or gson-api, causing a
Maven build failure with 'dependency has no version'. Pin to latest
released versions until they are included in the BOM.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: saurabh-oss

pom.xml

@@ -103,12 +103,14 @@
         <dependency>
             <groupId>io.jenkins.plugins</groupId>
             <artifactId>okhttp-api</artifactId>
+            <version>5.3.2-200.vedb_720a_cf1f8</version>
         </dependency>
 
         <!-- JSON Processing via Jenkins API plugin (replaces direct gson bundling) -->
         <dependency>
             <groupId>io.jenkins.plugins</groupId>
             <artifactId>gson-api</artifactId>
+            <version>2.13.2-198.v45e4a_55d9b_a_a_</version>
         </dependency>
 
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