ctime is not file creation time

[hanyujie2002]

write-yourself-a-git/write-yourself-a-git.org

Line 2547 in 7d01174

print(f" created: {datetime.fromtimestamp(e.ctime[0])}.{e.ctime[1]}, modified: {datetime.fromtimestamp(e.mtime[0])}.{e.mtime[1]}")

created may mislead readers. metadata modified would be better

Fixed in #55