docs: correct note about certificate chain order

[reubenmiller]

Proposed changes

Fix documentation about the order of certificates in the cert chain (when using a signing cert). The first cert in the chain must be the device cert.

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Improvement (general improvements like code refactoring that doesn't explicitly fix a bug or add any new functionality)
• Documentation Update (if none of the other choices apply)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Paste Link to the issue

Checklist

• I have read the CONTRIBUTING doc
• I have signed the CLA (in all commits with git commit -s)
• I ran cargo fmt as mentioned in CODING_GUIDELINES
• I used cargo clippy as mentioned in CODING_GUIDELINES
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Further comments

[github-actions]

Robot Results

✅ Passed	❌ Failed	⏭️ Skipped	Total	Pass %	⏱️ Duration
381	0	3	381	100	58m40.294s

[didier-wenzek]

Approved. Indeed, the order was incorrect.

[reubenmiller]

Approved. Indeed, the order was incorrect.

Yes that was my fault, so it was fitting that I fixed it.