Extend National_xg to 40 hours

[peterdudfield]

Pull Request

Description

Extend National XG ME to 40 hours

How Has This Been Tested?

CI tests

• [ ] Yes

Checklist:

• [ ] My code follows OCF's coding style guidelines
• [ ] I have performed a self-review of my own code
• [ ] I have made corresponding changes to the documentation
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] I have checked my code and corrected any misspellings

[codecov[bot]]

Codecov Report

Merging #26 (d3fc8d8) into main (46a5933) will not change coverage. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main      #26   +/-   ##
=======================================
  Coverage   99.44%   99.44%           
=======================================
  Files           8        8           
  Lines         358      358           
=======================================
  Hits          356      356           
  Misses          2        2           

Impacted Files	Coverage Δ
nowcasting_metrics/metrics/me.py	100.00% <100.00%> (ø)

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