Issue/update make forecasts

[peterdudfield]

Pull Request

Description

• update on fake forecasts
• update on update method in save

Fixes #

How Has This Been Tested?

• CI tests

• used these with new blend service

• [x] Yes

Checklist:

• [x] My code follows OCF's coding style guidelines
• [x] 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
• [x] I have checked my code and corrected any misspellings

[codecov[bot]]

Codecov Report

Merging #231 (7073190) into main (7194000) will not change coverage. Report is 3 commits behind head on main. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #231   +/-   ##
=======================================
  Coverage   95.17%   95.17%           
=======================================
  Files          27       27           
  Lines        1720     1720           
=======================================
  Hits         1637     1637           
  Misses         83       83           

Files Changed	Coverage Δ
nowcasting_datamodel/__init__.py	100.00% <100.00%> (ø)
nowcasting_datamodel/fake.py	100.00% <100.00%> (ø)
nowcasting_datamodel/save/update.py	99.01% <100.00%> (ø)

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