Fix test for `.exe` suffix on Windows
Fix test for `.exe` suffix on Windows

Without this change (using the correct regex syntax), the `eventexe` executable is missing the `.exe` (mandatory) suffix on Windows

karies/root,karies/root,olifre/root,root-mirror/root,karies/root,root-mirror/root,root-mirror/root,olifre/root,karies/root,karies/root,root-mirror/root,olifre/root,root-mirror/root,root-mirror/root,olifre/root,olifre/root,olifre/root,karies/root,karies/root,root-mirror/root,olifre/root,karies/root,olifre/root,karies/root,olifre/root,olifre/root,olifre/root,karies/root,root-mirror/root,root-mirror/root,karies/root,root-mirror/root,root-mirror/root