docs: Fixed ipv6form filter document (#320)

* fix ipv6form doc

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* add changelog fragment

* rename

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Ashwini Mhatre <mashu97@gmail.com>

changelogs/fragments/ipv6form-doc.yaml

@@ -0,0 +1,3 @@
+---
+doc_changes:
+  - ipv6form filter plugin - Fix to be displayed correctly.

docs/ansible.utils.ipv6form_filter.rst

@@ -44,6 +44,11 @@ Parameters
                     </div>
                 </td>
                 <td>
+                        <ul style="margin: 0; padding: 0"><b>Choices:</b>
+                                    <li>compress</li>
+                                    <li>expand</li>
+                                    <li>x509</li>
+                        </ul>
                 </td>
                     <td>
                     </td>

plugins/filter/ipv6form.py

@@ -61,7 +61,7 @@ DOCUMENTATION = """
             required: True
         format:
             type: str
-            choice:
+            choices:
                 ['compress', 'expand', 'x509']
             description: Different formats example. compress, expand, x509
 """