Version bump to 2.218.1

[joshdholtz]

Auto-generated by fastlane 🤖

Changes since release '2.218.0':

• [ci] fix homebrew bump url ([ci] fix homebrew bump url #21761) via Josh Holtz (@joshdholtz)
• [scan] Fix device selection issue fallback scenario ([scan] Fix device selection issue fallback scenario #21772) via arc-v2 (@arc-v2)
• [sigh] fix cache parameters validation ([sigh] fix cache parameters validation #21766) via Vitalii Budnik (@nekrich)
• [match] fix cache issues in read-only mode ([match] fix cache issues in read-only mode #21767) via Vitalii Budnik (@nekrich)

[joshdholtz]

Closing because I forgot to click merge on another PR 🤦‍♂️