fix: interpret the ssl_check_hostname as a boolean

[d9pouces]

!close #2210

ssl_check_hostname is left as-is ("false"), and is evaluated to True when a Redis connection is created.

[codecov]

Codecov Report

Attention: Patch coverage is 33.33333% with 2 lines in your changes missing coverage. Please review.

Project coverage is 81.49%. Comparing base (a0175b0) to head (d60f18f).

Files with missing lines	Patch %	Lines
kombu/utils/url.py	33.33%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2229      +/-   ##
==========================================
- Coverage   81.50%   81.49%   -0.02%     
==========================================
  Files          77       77              
  Lines        9524     9526       +2     
  Branches     1152     1153       +1     
==========================================
  Hits         7763     7763              
- Misses       1569     1570       +1     
- Partials      192      193       +1     

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