make api scripts work from any working directory

script/api/spec

@@ -11,7 +11,7 @@ require 'pathname'
 require 'yaml'
 require 'json'
 
-require './lib/api/open_api'
+require_relative '../../lib/api/open_api'
 
 path = Pathname(__dir__).join("../../docs/api/apiv3/openapi-spec.yml")
 spec = API::OpenAPI.assemble_spec path

script/api/validate_spec

@@ -3,7 +3,7 @@
 require 'pathname'
 require 'tempfile'
 
-openapi_yaml_spec_path = "./tmp/oas-generated.yml"
+openapi_yaml_spec_path = Pathname(__dir__).join('../../tmp/oas-generated.yml')
 full_spec = `#{Pathname(__dir__).join('spec')} --format yaml`
 status = 1