Remove trailing dot from OSH task comments (#2481)

Remove trailing dot from OSH task comments

... to make it easier to copy dashboard links.

TODO:

 Write new tests or update the old ones to cover new functionality.
 Update doc-strings where appropriate.
 Update or write new documentation in packit/packit.dev.
 ‹fill in›



Fixes
Related to
#2472
Merge before/after

RELEASE NOTES BEGIN
RELEASE NOTES END

Reviewed-by: Laura Barcziová

packit_service/worker/handlers/copr.py

@@ -558,7 +558,7 @@ def handle_scan(self):
             output = self.copr_build_helper.api.run_osh_build(
                 srpm_path=paths[1],
                 base_srpm=paths[0],
-                comment=f"Submitted via Packit Service for {build_dashboard_url}.",
+                comment=f"Submitted via Packit Service for {build_dashboard_url}",
             )
 
             if not output: