Fix inconsistency of 'NOTE:' description

Use the 'note' directive.

TrivialFix
Change-Id: If342940f8cc64591778ad21ce6cccbe006c0145b

doc/source/admin/configuration/hypervisor-vmware.rst

@@ -1021,7 +1021,9 @@ To customize the VMware driver, use the configuration option settings below.
 
        This is not the full path - just a folder prefix. This should only be used when a datastore cache is shared between compute nodes.
 
-       Note: This should only be used when the compute nodes are running on same host or they have a shared file system.
+       .. note::
+
+         This should only be used when the compute nodes are running on same host or they have a shared file system.
 
        Possible values:
 
@@ -1035,7 +1037,9 @@ To customize the VMware driver, use the configuration option settings below.
 
        The datastore_regex setting specifies the datastores to use with Compute. For example, datastore_regex="nas.*" selects all the data stores that have a name starting with "nas".
 
-       NOTE: If no regex is given, it just picks the datastore with the most freespace.
+       .. note::
+
+         If no regex is given, it just picks the datastore with the most freespace.
 
        Possible values:
 

doc/source/cli/nova-manage.rst

@@ -217,9 +217,11 @@ Nova Cells v2
     the properties cannot be set, this will return 2. Otherwise, the exit
     code will be 0.
 
-    NOTE: Updating the transport_url or database_connection fields on
-    a running system will NOT result in all nodes immediately using the
-    new values. Use caution when changing these values.
+    .. note::
+
+      Updating the transport_url or database_connection fields on
+      a running system will NOT result in all nodes immediately using the
+      new values. Use caution when changing these values.
 
 Nova Logs
 ~~~~~~~~~

doc/source/contributor/process.rst

@@ -69,7 +69,10 @@ used by many OpenStack projects, including the following steps.
 - String Freeze
 
   -  give translators time to translate all our strings
-  -  Note: debug logs are no longer translated
+
+  .. note::
+
+    debug logs are no longer translated
 
 - Dependency Freeze
 
@@ -104,12 +107,15 @@ https://blueprints.launchpad.net/nova/queens and specs at
 https://specs.openstack.org/openstack/nova-specs/specs/queens/index.html
 
 Starting with Liberty, we are keeping a backlog open for submission at all
-times. Note: the focus is on accepting and agreeing problem statements
-as being in scope, rather than queueing up work items for the next
-release. We are still working on a new lightweight process to get out of
-the backlog and approved for a particular release. For more details on
-backlog specs, please see:
-http://specs.openstack.org/openstack/nova-specs/specs/backlog/index.html
+times.
+
+.. note::
+
+  The focus is on accepting and agreeing problem statements as being in scope,
+  rather than queueing up work items for the next release. We are still
+  working on a new lightweight process to get out of the backlog and approved
+  for a particular release. For more details on backlog specs, please see:
+  http://specs.openstack.org/openstack/nova-specs/specs/backlog/index.html
 
 There can be exceptions, usually it's an urgent feature request that
 comes up after the initial deadline. These will generally be discussed

doc/source/user/upgrade.rst

@@ -181,7 +181,9 @@ An example of online data migrations are the flavor migrations done as part
 of Nova object version 1.18. This included a transient migration of flavor
 storage from one database location to another.
 
-:emphasis:`Note: Database downgrades are not supported.`
+.. note::
+
+  Database downgrades are not supported.
 
 Migration policy:
 '''''''''''''''''
@@ -279,8 +281,11 @@ Graceful service shutdown
     new workers before the graceful shutdown of the old workers. In the case
     of singleton services, like nova-compute, some actions could be delayed
     during the restart, but ideally no actions should fail due to the restart.
-    NOTE: while this is true for the RabbitMQ RPC backend, we need to confirm
-    what happens for other RPC backends.
+
+    .. note::
+
+      While this is true for the RabbitMQ RPC backend, we need to confirm
+      what happens for other RPC backends.
 
 API load balancer draining
     When upgrading API nodes, you can make your load balancer only send new