Feat: Improve release.md

[peaklabs-dev]

Questions:

• What is the planned versioning scheme for nightly releases?
• Is the release frequency correct like this?

Changes

• Feat: Added cloud and self-hosted update sections to the RELEASE.md file.
• Improved overall guide quality.

A lot of support requests were opened, so I improved the release guide.

Some different sample support requests (could probably link more than 10):

• https://discord.com/channels/459365938081431553/1285972347706409011
• https://discord.com/channels/459365938081431553/1284641240905809940
• https://discord.com/channels/459365938081431553/1285539194625851452/1285654102075768842
• https://discord.com/channels/459365938081431553/1283986911215620178
• Coolify Cloud not up to date #3531
• ...

[gitguardian]

⚠️ GitGuardian has uncovered 2 secrets following the scan of your pull request.

Please consider investigating the findings and remediating the incidents. Failure to do so may lead to compromising the associated services or software components.

🔎 Detected hardcoded secrets in your pull request

GitGuardian id	GitGuardian status	Secret	Commit	Filename
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-	-	Generic Password	e1bcae7	templates/compose/resend.yaml	View secret

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To avoid such incidents in the future consider

• following these best practices for managing and storing secrets including API keys and other credentials
• install secret detection on pre-commit to catch secret before it leaves your machine and ease remediation.

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[andrasbacsai]

Thank you for the PR!