Add badges to Geo pages

From speaking with the EM for Geo, all items in Geo should be
badged Premium, and these pages are missing the badging.

doc/administration/geo/replication/datatypes.md

@@ -5,7 +5,7 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 type: howto
 ---
 
-# Geo data types support
+# Geo data types support **(PREMIUM ONLY)**
 
 A Geo data type is a specific class of data that is required by one or more GitLab features to
 store relevant information.

doc/administration/geo/replication/geo_validation_tests.md

@@ -5,7 +5,7 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 type: howto
 ---
 
-# Geo validation tests
+# Geo validation tests **(PREMIUM ONLY)**
 
 The Geo team performs manual testing and validation on common deployment configurations to ensure
 that Geo works when upgrading between minor GitLab versions and major PostgreSQL database versions.