doc updates

[dimalinux]

Changes:

• Updates build.md with details on building release binaries
• Updates rpc.md with undocumented swap_clearOffers method
• Updates base docker images from bullseye to bookworm

Feel free to hit the edit button on these links to make direct changes to this PR.

• https://github.com/AthanorLabs/atomic-swap/blob/dimalinux/doc-updates/docs/build.md
• https://github.com/AthanorLabs/atomic-swap/blob/dimalinux/doc-updates/docs/rpc.md

[codecov[bot]]

Codecov Report

Patch coverage has no change and project coverage change: +0.10 :tada:

Comparison is base (7619b9a) 60.79% compared to head (e3cd314) 60.90%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #489 +/- ## ========================================== + Coverage 60.79% 60.90% +0.10% ========================================== Files 129 129 Lines 12834 12834 ========================================== + Hits 7802 7816 +14 + Misses 4208 4197 -11 + Partials 824 821 -3 ``` [see 6 files with indirect coverage changes](https://app.codecov.io/gh/AthanorLabs/atomic-swap/pull/489/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None)

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