Change github RSA key length

[Etienne-Goumet]

Types of changes

• [x] Bugfix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)

Proposed changes

Fix the script use by docker custom build : known_hosts.sh

Checklist

• [x] I have read the contribution guidelines
• [ ] For non-bugfix PRs, I have discussed this change on the mailing list/slack team.
• [ ] I have run grunt to verify the unit tests pass
• [ ] I have added suitable unit tests to cover the new/changed functionality

[linux-foundation-easycla[bot]]

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• :white_check_mark: login: Etienne-Goumet (822e2a8752ee7a29d6ac7bd3ce13f68f733ebf48)

[hardillb]

Hi,

Thanks for this, I'm sure I tested it after updating the hash and it worked, but obviously not.

[astorAtUST]

Manually patching this at local knownhosts, interested in knowing when could be available at the image here.

Initially I thought it was a ManInTheMiddle attack and I was getting wrong RSA details. :)

-2048 SHA256:uNiVztksCsDhcc0u9e8BujQXVUpKZIDTMczCvj3tD2s github.com (RSA) +3072 SHA256:uNiVztksCsDhcc0u9e8BujQXVUpKZIDTMczCvj3tD2s github.com (RSA)

Thanks!

[hardillb]

The next release will most likely be the 3.1.0 GA, not sure if/when a 3.0.x release will be yet.