Update dependency org.testng:testng to v7.8.0

Author: renovate[bot]

cucumber-testng/pom.xml

@@ -14,7 +14,7 @@
     <properties>
         <project.Automatic-Module-Name>io.cucumber.testng</project.Automatic-Module-Name>
         <hamcrest.version>2.2</hamcrest.version>
-        <testng.version>7.7.1</testng.version>
+        <testng.version>7.8.0</testng.version>
         <apiguardian-api.version>1.1.2</apiguardian-api.version>
         <mockito.version>5.3.1</mockito.version>
     </properties>