Fix carton sdk install on linux(aarch64)

[gibachan]

On linux for aarch64 architecture, carton sdk install command fails with the following error.

# carton sdk install wasm-5.7.1-RELEASE
- checking Swift compiler path: /root/.carton/sdk/wasm-5.7.1-RELEASE/usr/bin/swift
- checking Swift compiler path: /root/.swiftenv/versions/wasm-5.7.1-RELEASE/usr/bin/swift
Fetching release assets from https://api.github.com/repos/swiftwasm/swift/releases/tags/swift-wasm-5.7.1-RELEASE
Response contained body, parsing it now...
Response succesfully parsed, choosing from this number of assets: 6
The Swift version wasm-5.7.1-RELEASE was not found
Error: Invalid version wasm-5.7.1-RELEASE

The reason seemed to be a wrong download URL for that.

( carton sdk install searches the download URL from https://api.github.com/repos/swiftwasm/swift/releases/tags/swift-wasm-5.7.1-RELEASE )

[kateinoigakukun]

Nice catch! Thanks 😸