Bump testng from 7.6.1 to 7.8.0 in /dockerfile-image-update-itest#941

dependabot[bot] wants to merge 1 commit intomainsalesforce/dockerfile-image-update:mainfrom

dependabot/maven/dockerfile-image-update-itest/org.testng-testng-7.8.0salesforce/dockerfile-image-update:dependabot/maven/dockerfile-image-update-itest/org.testng-testng-7.8.0Copy head branch name to clipboard