chore(deps): update dependency org.testng:testng to v7.12.0

Author: renovate[bot]

pom.xml

@@ -30,7 +30,7 @@
         <sdk-core-version>9.25.0</sdk-core-version>
         <git-repository-name>networking-java-sdk</git-repository-name>
 
-        <testng-version>7.11.0</testng-version>
+        <testng-version>7.12.0</testng-version>
         <okhttp3-version>5.3.2</okhttp3-version>
         <surefire-version>3.5.4</surefire-version>
         <jacoco-plugin-version>0.8.14</jacoco-plugin-version>