Add sleep before retrying API call

[ofalvai]

Trying to get to the root cause of #53

[github-actions]

🎉 HACS repository validator action summary 🎉
✅ The repository is not archived
✅ manifest.json file exist
✅ All required keys are present in manifest.json
✅ hacs.json has the 'name' key set
✅ The repository has a description
✅ candy is added to https://github.com/home-assistant/brands NICE!
✅ The repository has topics
✅ The repository has issues enabled
✅ This day ends with an 'y' (Saturday)
✅ README.md exists
✅ Requirements validation
✅ HACS load check

[codecov]

Codecov Report

Merging #54 (e21a9b5) into main (a835bee) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main      #54   +/-   ##
=======================================
  Coverage   97.47%   97.48%           
=======================================
  Files           7        7           
  Lines         595      597    +2     
=======================================
+ Hits          580      582    +2     
  Misses         15       15           

Impacted Files	Coverage Δ
custom_components/candy/client/__init__.py	92.85% <100.00%> (+0.21%)	⬆️

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[ofalvai]

Superseded by #214