update gemspec for newest credential

we need the latest metasploit-credential to migrate
over any old style creds still lingering around in the
database.

MSP-11919

Author: David Maloney

metasploit-framework-db.gemspec

@@ -29,7 +29,7 @@ Gem::Specification.new do |spec|
 
   spec.add_runtime_dependency 'activerecord', *Metasploit::Framework::RailsVersionConstraint::RAILS_VERSION
   # Metasploit::Credential database models
-  spec.add_runtime_dependency 'metasploit-credential', '~> 0.13.8'
+  spec.add_runtime_dependency 'metasploit-credential', '~> 0.13.9'
   # Database models shared between framework and Pro.
   spec.add_runtime_dependency 'metasploit_data_models', '~> 0.21.3'
   # depend on metasploit-framewrok as the optional gems are useless with the actual code