Update dependency dart to v3.6.2

[renovate]

This PR contains the following updates:

Package	Update	Change
dart (source)	patch	3.6.1 -> 3.6.2

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Release Notes

dart-lang/sdk (dart)

v3.6.2

Compare Source

Released on: 2025-01-30

• Fixes a bug where HttpServer responses were not correctly encoded
  if a "Content-Type" header was set (issue #​59719).
• Fix dart format to parse code at language version 3.6 so that digit
  separators can be parsed correctly (issue #​59815, dart_style issue
  #​1630).
• Fixes an issue where the DevTools analytics did not distinguish
  between new and legacy inspector events (issue #​59884).
• When running dart fix on a folder that contains a library with multiple
  files and more than one needs a fix, the fix will now be applied correctly
  only once to each file (issue #​59572).

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