Fix unsupported PNPM error message (#10094)

PNPM 9 is now supported.

Co-authored-by: Jeff Widman <jeff@jeffwidman.com>

npm_and_yarn/lib/dependabot/npm_and_yarn/package_manager.rb

@@ -509,7 +509,7 @@ def raise_if_unsupported!(name, version)
         return unless name == PNPMPackageManager::NAME
         return unless Version.new(version) < Version.new("7")
 
-        raise ToolVersionNotSupported.new(PNPMPackageManager::NAME.upcase, version, "7.*, 8.*")
+        raise ToolVersionNotSupported.new(PNPMPackageManager::NAME.upcase, version, "7.*, 8.*, 9.*")
       end
 
       sig { params(name: String, version: T.nilable(String)).void }