Upgrade to Scala 3.1.2 for AirSpec

[xerial]

No description provided.

[codecov]

Codecov Report

Merging #2203 (c03e698) into master (0068ea0) will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2203   +/-   ##
=======================================
  Coverage   82.62%   82.63%           
=======================================
  Files         313      313           
  Lines       12348    12348           
  Branches      781      781           
=======================================
+ Hits        10203    10204    +1     
+ Misses       2145     2144    -1     

Impacted Files	Coverage Δ
...rx/src/main/scala/wvlet/airframe/rx/RxRunner.scala	94.73% <0.00%> (+0.43%)	⬆️

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