fix taper

[joamatab]

• fixes taper rib

before slab was missing from the taper

after the fix

[codecov]

Codecov Report

Attention: Patch coverage is 33.33333% with 6 lines in your changes are missing coverage. Please review.

Project coverage is 71.81%. Comparing base (f239e6d) to head (499ef17).

Files	Patch %	Lines
...sfactory/components/grating_coupler_rectangular.py	16.66%	4 Missing and 1 partial ⚠️
gdsfactory/components/taper.py	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2575      +/-   ##
==========================================
- Coverage   71.84%   71.81%   -0.03%     
==========================================
  Files         368      368              
  Lines       23904    23911       +7     
  Branches     3947     3948       +1     
==========================================
- Hits        17173    17171       -2     
- Misses       5521     5529       +8     
- Partials     1210     1211       +1     

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