Add update OS hint to privilige error docs

[samuelalexmclean]

Proposed change

Every ~six months I get this error, click through to the docs and go "hmm... I'm sure that's not how I usually fix this". Then I google it and all the Community posts remind me this is quite often caused by Ubuntu getting way out of date, and a sudo apt-get update && sudo apt-get upgrade fixes all my problems.

Proposing a hint to this effect in docs, while preserving the existing solutions / advice.

Type of change

• Spelling, grammar or other readability improvements (current branch).
• Adjusted missing or incorrect information in the current documentation (current branch).
• Added documentation for a new integration I'm adding to Home Assistant (next branch).
  • I've opened up a PR to add logo's and icons in Brands repository.
• Added documentation for a new feature I'm adding to Home Assistant (next branch).
• Removed stale or deprecated documentation.

Additional information

N/A

Checklist

• This PR uses the correct branch, based on one of the following:
  • I made a change to the existing documentation and used the current branch.
  • I made a change that is related to an upcoming version of Home Assistant and used the next branch.
• The documentation follows the Home Assistant documentation standards.

[frenck]

Thanks, @samuelalexmclean 👍