Bump testng from 6.8.8 to 7.7.0 in /examples/assemblies/assembly-jar-with-dependencies#6

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dependabot/maven/examples/assemblies/assembly-jar-with-dependencies/org.testng-testng-7.7.0khmarbaise/the-maven-practical-guide:dependabot/maven/examples/assemblies/assembly-jar-with-dependencies/org.testng-testng-7.7.0Copy head branch name to clipboard