chore(datacatalog): update README to reflect Beta launch status (#10055)

Author: tswast

.repo-metadata.json

@@ -4,7 +4,7 @@
   "product_documentation": "https://cloud.google.com/data-catalog",
   "client_documentation": "https://googleapis.dev/python/datacatalog/latest",
   "issue_tracker": "",
-  "release_level": "alpha",
+  "release_level": "beta",
   "language": "python",
   "repo": "googleapis/google-cloud-python",
   "distribution_name": "google-cloud-datacatalog",

README.rst

@@ -1,4 +1,4 @@
-Python Client for Google Cloud Data Catalog API (`Alpha`_)
+Python Client for Google Cloud Data Catalog API (`Beta`_)
 ==========================================================
 
 
@@ -10,7 +10,7 @@ include: Entries (Data Catalog representation of a cloud resource).
 - `Client Library Documentation`_
 - `Product Documentation`_
 
-.. _Alpha: https://github.com/googleapis/google-cloud-python/blob/master/README.rst
+.. _Beta: https://github.com/googleapis/google-cloud-python/blob/master/README.rst
 .. _Google Cloud Data Catalog API: https://cloud.google.com/data-catalog
 .. _Client Library Documentation: https://googleapis.dev/python/datacatalog/latest
 .. _Product Documentation:  https://cloud.google.com/data-catalog

setup.py

@@ -26,7 +26,7 @@
 # 'Development Status :: 3 - Alpha'
 # 'Development Status :: 4 - Beta'
 # 'Development Status :: 5 - Production/Stable'
-release_status = "Development Status :: 3 - Alpha"
+release_status = "Development Status :: 4 - Beta"
 dependencies = [
     "google-api-core[grpc] >= 1.14.0, < 2.0.0dev",
     "grpc-google-iam-v1 >= 0.12.3, < 0.13dev",