chore: upgrade to flutter_map 4.0.0

[monsieurtanuki]

What

• The upgrade to flutter_map 4.0.0 required some minor code change.

Screenshot

For the record, the new attribution display in flutter_map 4.0.0:

before clicking on the attribution icon	after clicking on the attribution icon

Part of

• chore(deps): bump flutter_map from 2.2.0 to 4.0.0 in /packages/smooth_app #4751

Impacted files

• knowledge_panel_world_map_card.dart: recoded with flutter_map 4.0.0 syntax
• pubspec.lock: wtf
• pubspec.yaml: upgraded to flutter_map 4.0.0

[codecov-commenter]

Codecov Report

Merging #4752 (7791719) into develop (8261f92) will increase coverage by 0.00%.
Report is 2 commits behind head on develop.
The diff coverage is 0.00%.

@@           Coverage Diff           @@
##           develop   #4752   +/-   ##
=======================================
  Coverage     9.85%   9.85%           
=======================================
  Files          313     313           
  Lines        15876   15865   -11     
=======================================
  Hits          1564    1564           
+ Misses       14312   14301   -11     

Files	Coverage Δ
...owledge_panels/knowledge_panel_world_map_card.dart	0.00% <0.00%> (ø)

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