fix: unit test values

[monsieurtanuki]

What

• Minor fixes about unit tests that rely on actual data. The data changed, we slightly change our tested values.

[codecov-commenter]

Codecov Report

Merging #783 (eb03b3a) into master (4043044) will decrease coverage by 0.11%.
Report is 3 commits behind head on master.
The diff coverage is 70.58%.

@@            Coverage Diff             @@
##           master     #783      +/-   ##
==========================================
- Coverage   73.11%   73.00%   -0.11%     
==========================================
  Files         203      203              
  Lines        7408     7417       +9     
==========================================
- Hits         5416     5415       -1     
- Misses       1992     2002      +10     

Files Changed	Coverage Δ
lib/src/open_food_api_client.dart	49.68% <0.00%> (-0.16%)	⬇️
test/api_get_to_be_completed_products_test.dart	97.05% <ø> (ø)
test/api_search_products_test.dart	87.15% <ø> (ø)
lib/src/utils/http_helper.dart	72.15% <73.33%> (-1.09%)	⬇️
test/api_get_taxonomy_ingredients_server_test.dart	100.00% <100.00%> (ø)

... and 2 files with indirect coverage changes

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[peterwvj]

Thanks

[monsieurtanuki]

Thank you @peterwvj for your review!