Charts: Update threshold props

[dlabrecq]

Update default threshold stroke width and dash array props from PatternFly-core

Fixes #3369

[patternfly-build]

PatternFly-React preview: https://patternfly-react-pr-3414.surge.sh

[codecov-io]

Codecov Report

Merging #3414 into master will decrease coverage by <.01%.
The diff coverage is 40%.

@@            Coverage Diff             @@
##           master    #3414      +/-   ##
==========================================
- Coverage   67.12%   67.12%   -0.01%     
==========================================
  Files         903      903              
  Lines       25442    25445       +3     
  Branches     2243     2243              
==========================================
+ Hits        17079    17081       +2     
- Misses       7332     7333       +1     
  Partials     1031     1031

Flag	Coverage Δ
#misc	95.45% <ø> (ø)	⬆️
#patternfly3	69.29% <ø> (ø)	⬆️
#patternfly4	64.26% <40%> (ø)	⬆️

Impacted Files	Coverage Δ
...rc/components/ChartTheme/themes/threshold-theme.ts	100% <ø> (ø)	⬆️
...s/src/components/ChartThreshold/ChartThreshold.tsx	66.66% <40%> (ø)	⬆️

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[tlabaj]

LGTM

[patternfly-build]

Your changes have been released in:

• @patternfly/react-charts@5.2.7
• @patternfly/react-docs@4.16.68

Thanks for your contribution! 🎉