feat: bump release level to production/stable (#97)

Fixes #75 🦕

No need to bump the major version as this library is already at 1.x.x

.repo-metadata.json

@@ -4,7 +4,7 @@
   "product_documentation": "https://cloud.google.com/billing/docs/how-to/budget-api-overview",
   "client_documentation": "https://googleapis.dev/python/billingbudgets/latest",
   "issue_tracker": "https://issuetracker.google.com/savedsearches/559770",
-  "release_level": "beta",
+  "release_level": "ga",
   "language": "python",
   "library_type": "GAPIC_AUTO",
   "repo": "googleapis/python-billingbudgets",

README.rst

@@ -1,7 +1,7 @@
 Python Client for Cloud Billing Budget API
 =====================================================
 
-|beta| |pypi| |versions|
+|GA| |pypi| |versions|
 
 `Cloud Billing Budget API`_: The Cloud Billing Budget API stores Cloud Billing budgets, which define a
 budget plan and the rules to execute as spend is tracked against that
@@ -10,8 +10,8 @@ plan.
 - `Client Library Documentation`_
 - `Product Documentation`_
 
-.. |beta| image:: https://img.shields.io/badge/support-beta-orange.svg
-   :target: https://github.com/googleapis/google-cloud-python/blob/master/README.rst#beta-support
+.. |GA| image:: https://img.shields.io/badge/support-ga-gold.svg
+   :target: https://github.com/googleapis/google-cloud-python/blob/master/README.rst#general-availability
 .. |pypi| image:: https://img.shields.io/pypi/v/google-cloud-billing-budgets.svg
    :target: https://pypi.org/project/google-cloud-billing-budgets
 .. |versions| image:: https://img.shields.io/pypi/pyversions/google-cloud-billing-budgets.svg

setup.py

@@ -23,7 +23,7 @@
 name = "google-cloud-billing-budgets"
 description = "Cloud Billing Budget API API client library"
 version = "1.3.0"
-release_status = "Development Status :: 4 - Beta"
+release_status = "Development Status :: 5 - Production/Stable"
 dependencies = [
     "google-api-core[grpc] >= 1.26.0, <2.0.0dev",
     "proto-plus >= 1.10.0",