add checksum for arm64 source tarball for Go 1.18.3

[Micket]

(created using eb --new-pr)

[Micket]

Test report by @Micket
SUCCESS
Build succeeded for 1 out of 1 (1 easyconfigs in total)
vera-c1 - Linux Rocky Linux 8.7, x86_64, Intel Xeon Processor (Skylake), Python 3.6.8
See https://gist.github.com/Micket/ca9aca2d138ba6808f927f88e67312ae for a full test report.

[boegel]

@boegelbot please test @ generoso

[boegelbot]

@boegel: Request for testing this PR well received on login1

PR test command 'EB_PR=17903 EB_ARGS= EB_CONTAINER= /opt/software/slurm/bin/sbatch --job-name test_PR_17903 --ntasks=4 ~/boegelbot/eb_from_pr_upload_generoso.sh' executed!

• exit code: 0
• output:

Submitted batch job 10777

Test results coming soon (I hope)...

- notification for comment with ID 1545877989 processed

Message to humans: this is just bookkeeping information for me,
it is of no use to you (unless you think I have a bug, which I don't).

[boegelbot]

Test report by @boegelbot
SUCCESS
Build succeeded for 1 out of 1 (1 easyconfigs in total)
cns1 - Linux Rocky Linux 8.5, x86_64, Intel(R) Xeon(R) CPU E5-2667 v3 @ 3.20GHz (haswell), Python 3.6.8
See https://gist.github.com/boegelbot/0b01793ee9a4d14beee692f9df8e28a1 for a full test report.

[boegel]

Test report by @boegel
SUCCESS
Build succeeded for 1 out of 1 (1 easyconfigs in total)
fair-mastodon-c6g-2xlarge-0001 - Linux Rocky Linux 8.7, AArch64, ARM UNKNOWN (graviton2), Python 3.6.8
See https://gist.github.com/boegel/73b404a28feca036c0be1250b4010c84 for a full test report.

[boegel]

lgtm

[boegel]

Going in, thanks @Micket!