Update scalafmt-core to 2.6.3

[scala-steward]

Updates org.scalameta:scalafmt-core from 2.6.2 to 2.6.3.
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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Ignore future updates

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labels: library-update, semver-patch

[codecov]

Codecov Report

Merging #527 into master will decrease coverage by 11.97%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master     #527       +/-   ##
===========================================
- Coverage   90.45%   78.47%   -11.98%     
===========================================
  Files          24       24               
  Lines         618      618               
  Branches        1        1               
===========================================
- Hits          559      485       -74     
- Misses         59      133       +74     

Impacted Files	Coverage Δ
github4s/src/main/scala/github4s/Github.scala	0.00% <0.00%> (-100.00%)	⬇️
...ithub4s/src/main/scala/github4s/GithubConfig.scala	0.00% <0.00%> (-100.00%)	⬇️
...4s/src/main/scala/github4s/http/Http4sSyntax.scala	0.00% <0.00%> (-100.00%)	⬇️
...s/src/main/scala/github4s/domain/PullRequest.scala	0.00% <0.00%> (-100.00%)	⬇️
...s/src/main/scala/github4s/modules/GithubAPIs.scala	0.00% <0.00%> (-100.00%)	⬇️
.../src/main/scala/github4s/http/RequestBuilder.scala	0.00% <0.00%> (-100.00%)	⬇️
...ub4s/src/main/scala/github4s/http/HttpClient.scala	16.66% <0.00%> (-70.84%)	⬇️
.../scala/github4s/interpreters/AuthInterpreter.scala	60.00% <0.00%> (-40.00%)	⬇️
github4s/src/main/scala/github4s/Decoders.scala	84.32% <0.00%> (-6.72%)	⬇️

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