BugFix: Asgi Path Param Encoding change to utf-8

[YunchuWang]

fixes Azure/azure-functions-python-worker#1437

asgi encoding reference (https://asgi.readthedocs.io/en/latest/specs/www.html#wsgi-encoding-differences)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.10%. Comparing base (31f3d42) to head (a62c126).

Additional details and impacted files

@@           Coverage Diff           @@
##              dev     #208   +/-   ##
=======================================
  Coverage   93.10%   93.10%           
=======================================
  Files          56       56           
  Lines        3247     3247           
  Branches      666      666           
=======================================
  Hits         3023     3023           
  Misses        137      137           
  Partials       87       87           

Flag	Coverage Δ
unittests	93.07% <100.00%> (ø)

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[fredrike]

Better to use unicode literals to avoid further errors.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.10%. Comparing base (31f3d42) to head (a62c126).
Report is 1 commits behind head on dev.

❗ Current head a62c126 differs from pull request most recent head 231ecfe. Consider uploading reports for the commit 231ecfe to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##              dev     #208   +/-   ##
=======================================
  Coverage   93.10%   93.10%           
=======================================
  Files          56       56           
  Lines        3247     3247           
  Branches      666      666           
=======================================
  Hits         3023     3023           
  Misses        137      137           
  Partials       87       87           

Flag	Coverage Δ
unittests	93.07% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.