qm-rollback: add page

[abhisheksrivastava177]

• 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 PR title conforms to the recommended templates.
• Version of the command being documented (if known):

[tldr-bot]

The build for this PR failed with the following error(s):

pages/linux/qm-rollback.md:4: TLDR017 Information link should be surrounded with angle brackets

Please fix the error(s) and push again.

[tldr-bot]

The build for this PR failed with the following error(s):

pages/linux/qm-rollback.md:
Error: Parse error on line 4:
.../pve-docs/qm.1.html>- Rollback the sta
-----------------------^
Expecting 'END_INFORMATION_LINK_URL', got 'NEWLINE'
pages/linux/qm-rollback.md:4: TLDR011 Page never contains more than a single empty line

Please fix the error(s) and push again.

[kbdharun]

Thanks for your contribution. I have some suggestions for this page.

[EmilyGraceSeville7cf]

Merged, thanks! ❤️