Fix cbl-mariner purl_type support

Proposal

Support for the cbl-mariner purl type was supposed to be added by Add purl types for Container Scanning OS packag... (#398810 - closed), however, there was an oversight in the implementation, and the cbl_mariner purl type (using an underscore _ instead of a hyphen -) was added by mistake instead.

Since trivy produces an SBOM that uses cbl-mariner as the purl type, this means that these SBOM components will be rejected during ingestion.

Implementation Plan

1. Update Enums::Sbom::PURL_TYPES to use cbl-mariner instead of cbl_mariner:

   diff --git a/app/models/concerns/enums/sbom.rb b/app/models/concerns/enums/sbom.rb
   index 59aafc32d945..d519b6aac397 100644
   --- a/app/models/concerns/enums/sbom.rb
   +++ b/app/models/concerns/enums/sbom.rb
   @@ -18,7 +18,7 @@ class Sbom
          apk: 9,
          rpm: 10,
          deb: 11,
   -      cbl_mariner: 12
   +      'cbl-mariner': 12
        }.with_indifferent_access.freeze
   
        def self.component_types

2. Update the unit tests:

   diff --git a/spec/models/concerns/enums/sbom_spec.rb b/spec/models/concerns/enums/sbom_spec.rb
   index 41670880630f..e5691505154e 100644
   --- a/spec/models/concerns/enums/sbom_spec.rb
   +++ b/spec/models/concerns/enums/sbom_spec.rb
   @@ -22,7 +22,7 @@
          :apk                  | 9
          :rpm                  | 10
          :deb                  | 11
   -      :cbl_mariner          | 12
   +      'cbl-mariner'         | 12
          'unknown-pkg-manager' | 0
          'Python (unknown)'    | 0
        end