chore: add api_shortname and library_type to repo metadata (#290)

Update .repo-metadata.json as required by go/library-data-integrity

.repo-metadata.json

@@ -4,12 +4,14 @@
   "product_documentation": "https://cloud.google.com/document-ai/docs/",
   "client_documentation": "https://cloud.google.com/nodejs/docs/reference/documentai/latest",
   "issue_tracker": "",
-  "release_level": "ga",
+  "release_level": "stable",
   "language": "nodejs",
   "repo": "googleapis/nodejs-document-ai",
   "distribution_name": "@google-cloud/documentai",
   "api_id": "documentai.googleapis.com",
   "requires_billing": true,
   "codeowner_team": "@googleapis/ml-apis",
-  "default_version": "v1"
+  "default_version": "v1",
+  "api_shortname": "documentai",
+  "library_type": "GAPIC_AUTO"
 }

README.md

@@ -4,7 +4,7 @@
 
 # [Document AI: Node.js Client](https://github.com/googleapis/nodejs-document-ai)
 
-[![release level](https://img.shields.io/badge/release%20level-general%20availability%20%28GA%29-brightgreen.svg?style=flat)](https://cloud.google.com/terms/launch-stages)
+
 [![npm version](https://img.shields.io/npm/v/@google-cloud/documentai.svg)](https://www.npmjs.org/package/@google-cloud/documentai)
 [![codecov](https://img.shields.io/codecov/c/github/googleapis/nodejs-document-ai/main.svg?style=flat)](https://codecov.io/gh/googleapis/nodejs-document-ai)
 
@@ -182,18 +182,17 @@ _Legacy Node.js versions are supported as a best effort:_
 This library follows [Semantic Versioning](http://semver.org/).
 
 
-This library is considered to be **General Availability (GA)**. This means it
-is stable; the code surface will not change in backwards-incompatible ways
+
+This library is considered to be **stable**. The code surface will not change in backwards-incompatible ways
 unless absolutely necessary (e.g. because of critical security issues) or with
-an extensive deprecation period. Issues and requests against **GA** libraries
+an extensive deprecation period. Issues and requests against **stable** libraries
 are addressed with the highest priority.
 
 
 
 
 
 
-
 More Information: [Google Cloud Platform Launch Stages][launch_stages]
 
 [launch_stages]: https://cloud.google.com/terms/launch-stages