Fix typos in release notes

This is to fix below typos in release notes:
  Keytone
  specifed
  availabilty
  maange
  expetected
  migratons
  maintanance

Change-Id: Ifbecf095f2f549d4ec40892484ec1b725927fb44

releasenotes/notes/bug-1695861-ebc8a0aa7a87f7e0.yaml

@@ -3,7 +3,7 @@ fixes:
   - |
     Fixes `bug 1695861`_ in which the aggregate API accepted requests that
     have availability zone names including ':'. With this fix, a creation
-    of an availabilty zone whose name includes ':' results in a
+    of an availability zone whose name includes ':' results in a
     ``400 BadRequest`` error response.
 
     .. _bug 1695861: https://bugs.launchpad.net/nova/+bug/1695861

releasenotes/notes/deprecate-nova-manage-network-commands-212726e67bffdfc4.yaml

@@ -4,7 +4,7 @@ deprecations:
     The following nova-manage commands are deprecated for removal in the
     Nova 15.0.0 Ocata release:
 
-    * nova-maange account scrub
+    * nova-manage account scrub
     * nova-manage fixed *
     * nova-manage floating *
     * nova-manage network *

releasenotes/notes/hyperv-uefi-secure-boot-a2a617ac2c313afd.yaml

@@ -7,7 +7,7 @@ features:
     * Images should be prepared for Generation 2 VMs. The image property
       "hw_machine_type=hyperv-gen2" is mandatory.
     * The guest OS type must be specified in order to properly spawn the VMs.
-      It can be specifed through the image property "os_type", and the
+      It can be specified through the image property "os_type", and the
       acceptable values are "windows" or "linux".
     * The UEFI Secure Boot feature can be requested through the image property
       "os_secure_boot" (acceptable values: "disabled", "optional", "required")

releasenotes/notes/instance-path-2efca507456d8a70.yaml

@@ -9,6 +9,6 @@ upgrade:
     ``/opt/stack/data/nova/instances/34198248-5541-4d52-a0b4-a6635a7802dd/``.
 
     In Newton backward compatibility is dropped. For instances that haven't
-    been restarted since Folsom and earlier maintanance should be scheduled
+    been restarted since Folsom and earlier maintenance should be scheduled
     before upgrade(stop, rename directory to instance.uuid, then start) so Nova
     will start using new paths for instances.

releasenotes/notes/removing-pci-parent_addr-migration-f7dfa2b441cf30e8.yaml

@@ -3,5 +3,5 @@ upgrade:
   - In mitaka, an online migration was added to migrate older SRIOV parent
     device information from extra_info to a new column. Since two releases
     have gone out with that migration, it is removed in Ocata and operators
-    are expetected to have run it as part of either of the previous two
+    are expected to have run it as part of either of the previous two
     releases, if applicable.

releasenotes/notes/server_migrations-30519b35d3ea6763.yaml

@@ -2,7 +2,7 @@
 features:
   - |
     Add two new list/show API for server-migration.
-    The list API will return the in progress live migratons
+    The list API will return the in progress live migrations
     information of a server. The show API will return
     a specified in progress live migration of a server.
     This has been added in microversion 2.23.

releasenotes/notes/validate-expired-user-tokens-57a265cb4ee4ba6f.yaml

@@ -8,7 +8,7 @@ features:
     has expired. In order to use this functionality a service user needs to
     be created. Add service user configurations in ``nova.conf`` under
     ``service_user`` group and set ``send_service_user_token`` flag to
-    ``True``. The minimum Keytone API version 3.8 and Keystone middleware
+    ``True``. The minimum Keystone API version 3.8 and Keystone middleware
     version 4.12.0 is required to use this functionality.
     This only currently works with Nova - Cinder and Nova - Neutron API
     interactions.