Fix typo in "command"

[wpgoble]

Change "comman" to "command" in the sentence "But the above comman can be used ..." that appears at the end of the "Install the Sample Database Image" section of the INSTALL.md document.

[eirena003]

I would like to work on this please!

[github-actions]

Great! I assigned you (@eirena003) to the issue. Have fun working on it!