GIT_SILENT: use qt5.15 iso

2 jobs for master in 29 minutes and 52 seconds (queued for 84 minutes and 39 seconds)
Status Job ID Name Coverage
  Build
failed #81417
build_clazy_clang_tidy

00:16:35

passed #81416
linux kf5-qt5 qt5.15

00:13:16

36.0%
 
Name Stage Failure
failed
build_clazy_clang_tidy Build
[ 92%] Linking CXX executable ../../bin/akonadi_imap_resource
[ 92%] Built target akonadi_imap_resource
make: *** [Makefile:160: all] Error 2
Uploading artifacts for failed job
Uploading artifacts...
WARNING: JUnitTestResults.xml: no matching files
ERROR: No files to upload
Cleaning up file based variables
ERROR: Job failed: exit code 1