chore(bash): recognize aarch64 as arm64

[daniellienert]

Reason for This PR

Recognize aarch64 as stated on alpine linux in docker on an Apple M1

Description of Changes

[Author TODO: add description of changes.]

License Acceptance

By submitting this pull request, I confirm that my contribution is made under the terms of the MIT license.

PR Checklist

[Author TODO: Meet these criteria.]
[Reviewer TODO: Verify that these criteria are met. Request changes if not]

• All commits in this PR are signed (git commit -s).
• The reason for this PR is clearly provided (issue no. or explanation).
• The description of changes is clear and encompassing.
• Any required documentation changes (code and docs) are included in this PR.
• Any user-facing changes are mentioned in CHANGELOG.md.
• All added/changed functionality is tested.

[rustatian]

Hey, @daniellienert 👋🏻 Thanks for the contribution ❤️

The fix seems valid to me, but I don't have an aarch64 platform to test it 😿 Might be you have already tested it? 🙏🏻

[daniellienert]

@rustatian sure 😉

with and without the patch

[www-data@9cffde304615 ~/app]
# curl --proto '=https' --tlsv1.2 -sSf https://raw.githubusercontent.com/daniellienert/roadrunner/master/download-latest.sh | sh
ERROR: RoadRunner binary is not available for your OS distribution or your architecture yet.

However, you can easily compile the binary from the source files.
Follow the steps at the page ("Source" tab): TODO
[www-data@9cffde304615 ~/app]
# curl --proto '=https' --tlsv1.2 -sSf https://raw.githubusercontent.com/daniellienert/roadrunner/task/aarch64/download-latest.sh | sh
Downloading RoadRunner binary 2.12.2 for linux, architecture arm64...
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
100 12.2M  100 12.2M    0     0  4587k      0  0:00:02  0:00:02 --:--:-- 7039k
RoadRunner 2.12.2 archive successfully downloaded as roadrunner-2.12.2-linux-arm64.tar.gz
[www-data@9cffde304615 ~/app]
# uname -m
aarch64

[rustatian]

Excellent, thank you, @daniellienert 👍🏻