Fix issue, where we've generated non-existing names if a filename had a colon

[onelxj]

Without that, it fails on the Jammy image:

Error:  No files matching the pattern were found: "reboot/benchmarks/construct/reports/construct_2025-02-17T03".

Error:  No files matching the pattern were found: "reboot/benchmarks/construct/reports/construct_assign_sync_read_state_id_2025-02-17T03".

https://github.com/reboot-dev/mono/actions/runs/18268773938/job/52007624523?pr=4972

On Focal we get that:

./public/submodules/dev-tools/check-style.sh --full
xargs: file: No such file or directory

https://github.com/reboot-dev/mono/actions/runs/18267517312/job/52004088667

1. The filename truncation was broken if we have a colon as part of a filename, so we will get a non-existing file name;
2. So the xargs thing works differently, so it wasn't failing before, but silently continuing with an error and removed the non-existing file from the list of affected files, but now on Jammy it passes it through and then fails when we try to invoke prettier.