Update rsactftool.py.md

[kant]

• The page(s) are in the correct platform directories: common, linux, osx, windows, sunos, android, etc.
• The page(s) have at most 8 examples.
• The page description(s) have links to documentation or a homepage.
• The page(s) follow the content guidelines.
• The page(s) follow the style guide.
• The PR title conforms to the recommended templates.
• Version of the command being documented (if known):

[MachiavelliII]

I reviewed the main page, and I didn't include the .py extension in the English page:
#16078

[kant]

I follow the warning from here
Inconsistency found in file: pages.es/common/rsactftool.py.md: rsactftool should be rsactftool.py

[gutjuri]

Not sure if people looking for the page would intuitively search for rsactftool instead of rsactftool.py. So it might be worth it to add an alias page