add commit when making a historic forecast

[peterdudfield]

Pull Request

Description

Add commit to historic forecasts

Fixes #

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 #152 (91e9b4c) into main (d58f6c1) will increase coverage by 0.00%. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #152   +/-   ##
=======================================
  Coverage   94.92%   94.92%           
=======================================
  Files          22       22           
  Lines        1300     1301    +1     
=======================================
+ Hits         1234     1235    +1     
  Misses         66       66           

Impacted Files	Coverage Δ
nowcasting_datamodel/__init__.py	100.00% <100.00%> (ø)
nowcasting_datamodel/save/update.py	98.97% <100.00%> (+0.01%)	:arrow_up:

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