Transition to Temurin in CI builds

[pomadchin]

See

• https://blog.adoptopenjdk.net/2021/08/goodbye-adoptopenjdk-hello-adoptium/
• Archive this repo? olafurpg/setup-scala#49

[codecov]

Codecov Report

Merging #586 (cf00c60) into master (53fea11) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #586   +/-   ##
=======================================
  Coverage   95.14%   95.14%           
=======================================
  Files          65       65           
  Lines        1134     1134           
  Branches        5        5           
=======================================
  Hits         1079     1079           
  Misses         55       55           

Flag	Coverage Δ
2.12.15	95.14% <ø> (ø)
2.13.7	95.78% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 53fea11...cf00c60. Read the comment docs.