Updated test coverage after added new sub-metric to 'Project statistics'

Signed-off-by: Lukasz Gryglicki <lukaszgryglicki@o2.pl>

Author: lukaszgryglicki

tests.yaml

@@ -1048,6 +1048,9 @@ projects:
           - ['project_stats,Group2', Commits, 1]
           - ['project_stats,All', Committers, 1]
           - ['project_stats,Group1', Committers, 1]
+          - ['project_stats,All', 'Contributors (issue creators, PR creators, committers)', 3]
+          - ['project_stats,Group1', 'Contributors (issue creators, PR creators, committers)', 1]
+          - ['project_stats,Group2', 'Contributors (issue creators, PR creators, committers)', 1]
           - ['project_stats,All', Events, 8]
           - ['project_stats,Group1', Events, 4]
           - ['project_stats,Group2', Events, 2]