[release] Tidy release notes for Wallaby

Change-Id: I5ecb42bc752c272c8a2b48b6c8499344f27fef5e

releasenotes/notes/ansible-2.9-2.9-1a666cc9aab51c9d.yaml

----
-upgrade:
-  - |
-    Updates the minimum supported version of Ansible from 2.8 to 2.9. The
-    maximum supported version stays at 2.9. This is true for both Kayobe and
-    Kolla Ansible.

releasenotes/notes/ansible_max_2_10-f54a5e6fbae5db91.yaml

@@ -2,5 +2,5 @@
 upgrade:
   - |
     Updates the maximum supported version of Ansible from 2.9 to 2.10. The
-    minimum supported version stays at 2.9. This is true for both Kayobe and
-    Kolla Ansible.
+    minimum supported version is updated from 2.8 to 2.9. This is true for both
+    Kayobe and Kolla Ansible.

releasenotes/notes/ironic-enabled-bios-interfaces-2b0a17d68126ac09.yaml

 ---
 features:
   - |
-    Allow users to modify Ironic `kolla_ironic_enabled_bios_interfaces` and
-    `kolla_ironic_default_bios_interface` in ironic.yml.
+    Allow users to modify Ironic ``kolla_ironic_enabled_bios_interfaces`` and
+    ``kolla_ironic_default_bios_interface`` in ``ironic.yml``.

releasenotes/notes/remove-qinling-support-67635a37e620fc7b.yaml

 upgrade:
   - |
-    The ``Qinling`` project is no longer maintained and
-    `retired since the Wallaby cycle`__ . Support for deployment of Qinling has
-    been removed.
+    The ``Qinling`` project is no longer maintained and `retired since the
+    Wallaby cycle`__. Support for deployment of Qinling has been removed.
 
     __ http://lists.openstack.org/pipermail/openstack-discuss/2020-November/018638.html

releasenotes/notes/remove-searchlight-support-a164fd550bfc14d4.yaml

 upgrade:
   - |
-    The ``Searchlight`` project is no longer maintained and
-    `retired since Wallaby cycle`__ . Support for deployment of Searchlight has
-    been removed.
+    The ``Searchlight`` project is no longer maintained and `retired since the
+    Wallaby cycle`__. Support for deployment of Searchlight has been removed.
 
     __ http://lists.openstack.org/pipermail/openstack-discuss/2020-November/018637.html