Capitalize geo -> Geo and remove trailing whitespace

[ci skip]

doc/gitlab-geo/database.md

@@ -155,7 +155,7 @@ will not be able to perform all necessary configuration steps. Refer to
     each node.
 
     If you are using a cloud provider, you can lookup the addresses for each
-    geo node through their management console. A table of terminology is
+    Geo node through their management console. A table of terminology is
     provided below because terminology varies between vendors.
 
     | GitLab Terminology | Amazon Web Services | Google Cloud Platform |
@@ -163,7 +163,7 @@ will not be able to perform all necessary configuration steps. Refer to
     | Interface address | Private address | Internal address |
     | Public address | Public address | External address |
 
-    To lookup the address of a geo node, on the geo node execute:
+    To lookup the address of a Geo node, on the Geo node execute:
 
     ```bash
     # Interface address
@@ -217,7 +217,6 @@ will not be able to perform all necessary configuration steps. Refer to
 
     For external PostgreSQL instances, [see additional instructions][external postgresql].
 
-
 1. Optional: If you want to add another secondary, the relevant setting would look like:
 
     ```ruby