Update scalameta to 4.5.8

[scala-steward]

Updates org.scalameta:scalameta from 4.4.35 to 4.5.8.
GitHub Release Notes - Version Diff

I'll automatically update this PR to resolve conflicts as long as you don't change it yourself.

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Adjust future updates

Add this to your .scala-steward.conf file to ignore future updates of this dependency:

updates.ignore = [ { groupId = "org.scalameta", artifactId = "scalameta" } ]

Or, add this to slow down future updates of this dependency:

dependencyOverrides = [{
  pullRequests = { frequency = "@monthly" },
  dependency = { groupId = "org.scalameta", artifactId = "scalameta" }
}]

labels: library-update, early-semver-minor, semver-spec-minor, commit-count:1

[codecov]

Codecov Report

Merging #1491 (b553a0e) into master (47bc1c2) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1491   +/-   ##
=======================================
  Coverage   83.34%   83.34%           
=======================================
  Files          88       88           
  Lines        5507     5507           
  Branches      147      147           
=======================================
  Hits         4590     4590           
  Misses        917      917           

Impacted Files	Coverage Δ
...ators/scala/akkaHttp/AkkaHttpServerGenerator.scala	91.14% <ø> (ø)

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