Copying a file with special character & spaces
Note that the suspect filename character may not actually be ?, that could be just a filename displaying artifact if your system somehow doesn't properly display that character. BTW, R?glement sounds awfully close to the French Règlement.

One possible approach to accessing those files without worrying too much about typing in those characters or escaping them would be to try to wildcard them instead. In your case try something along these lines (use a more specific pattern if there are other files matching this one besides the 2 files of interest):

aws s3 sync R*glement*pdf s3://bucket_name/raw_files/ --sse