Update Observation+Dates.swift so that start and end dates are correct

[mjoerke]

Update Observation+Dates.swift so that start and end dates are correct

♻️ Current situation & Problem

• In Observation+Dates.swift the start and end dates are swapped

💡 Proposed solution

• Minor edits to Observation+Dates.swift so that start and end dates are set correctly

⚙️ Release Notes

• This does not change any functionality and should not be a breaking change

Testing

• I did not include any additional tests (but let me know if you think this is necessary)

Code of Conduct & Contributing Guidelines

By submitting creating this pull request, you agree to follow our Code of Conduct and Contributing Guidelines:

• I agree to follow the Code of Conduct and Contributing Guidelines.

[PSchmiedmayer]

Thank you so much for the fix @mjoerke! 🚀

[codecov]

Codecov Report

Merging #36 (ab9f896) into main (354c180) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main      #36   +/-   ##
=======================================
  Coverage   92.12%   92.12%           
=======================================
  Files          20       20           
  Lines         875      875           
=======================================
  Hits          806      806           
  Misses         69       69           

Impacted Files	Coverage Δ
...HIR/Observation Extensions/Observation+Dates.swift	100.00% <100.00%> (ø)

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