fix typo in documentation

[md-touhid]

fix typo in word the 'deprecated'

List at least one fixed issue.

• fix type

Pre-launch Checklist

• [done] I made sure the project builds.
• [done] I read the Contributor Guide and followed the process outlined there for submitting PRs.
• [done] I updated pubspec.yaml with an appropriate new version according to the pub versioning philosophy, or this PR is does not need version changes.
• [done] I updated CHANGELOG.md to add a description of the change.
• [done] I updated/added relevant documentation (doc comments with ///).
• [done] I rebased onto main.
• [done] I added new tests to check the change I am making, or this PR does not need tests.
• [done] I made sure all existing and new tests are passing.
• [done] I ran dart format . and committed any changes.
• [done] I ran flutter analyze and fixed any errors.

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -6.53% ⚠️

Comparison is base (4c7bb44) 100.00% compared to head (7e2c4a3) 93.47%.
Report is 4 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##              main    #1117      +/-   ##
===========================================
- Coverage   100.00%   93.47%   -6.53%     
===========================================
  Files            1        6       +5     
  Lines           17       92      +75     
===========================================
+ Hits            17       86      +69     
- Misses           0        6       +6     

Flag	Coverage Δ
unittests	?

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Files Changed	Coverage Δ
...andler_platform_interface/lib/src/permissions.dart	91.66% <ø> (ø)

... and 6 files with indirect coverage changes

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[mvanbeusekom]

Thank you for this contribution. Good catch!