Refresh SbomConfigProvider when config values change

[micyunmsft]

Currently SbomConfigProvider doesn't pick up updated config values when the global Configuration changes.

[codecov-commenter]

Codecov Report

Attention: 5 lines in your changes are missing coverage. Please review.

Comparison is base (d251a5f) 59.78% compared to head (293f1d8) 59.76%.

Files	Patch %	Lines
...m.Api/Manifest/Configuration/SbomConfigProvider.cs	16.66%	4 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #475      +/-   ##
==========================================
- Coverage   59.78%   59.76%   -0.02%     
==========================================
  Files         248      248              
  Lines        7566     7575       +9     
  Branches      901      901              
==========================================
+ Hits         4523     4527       +4     
- Misses       2631     2635       +4     
- Partials      412      413       +1     

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[jlperkins]

Closing in favor of the type of fix described in #480.