[PR #5766/317f79ff backport][stable-6] multiple scaleway modules: fixed markups in doc (#5827)

multiple scaleway modules: fixed markups in doc (#5766)

* multiple scaleway modules: fixed markups in doc

* Update plugins/modules/scaleway_ip.py

Co-authored-by: Felix Fontein <felix@fontein.de>

* Update plugins/modules/scaleway_volume.py

Co-authored-by: Felix Fontein <felix@fontein.de>

* Update plugins/modules/scaleway_private_network.py

Co-authored-by: Felix Fontein <felix@fontein.de>

* Update plugins/modules/scaleway_security_group.py

Co-authored-by: Felix Fontein <felix@fontein.de>

* Update plugins/modules/scaleway_security_group_rule.py

Co-authored-by: Felix Fontein <felix@fontein.de>

* Update plugins/modules/scaleway_sshkey.py

Co-authored-by: Felix Fontein <felix@fontein.de>

* further docs adjustments

Co-authored-by: Felix Fontein <felix@fontein.de>
(cherry picked from commit 317f79ff1f)

Co-authored-by: Alexei Znamensky <103110+russoz@users.noreply.github.com>

plugins/modules/scaleway_sshkey.py

@@ -19,8 +19,7 @@ module: scaleway_sshkey
 short_description: Scaleway SSH keys management module
 author: Remy Leone (@remyleone)
 description:
-    - This module manages SSH keys on Scaleway account
-      U(https://developer.scaleway.com)
+    - "This module manages SSH keys on Scaleway account U(https://developer.scaleway.com)."
 extends_documentation_fragment:
 - community.general.scaleway
 
@@ -42,7 +41,7 @@ options:
   api_url:
     type: str
     description:
-      - Scaleway API URL
+      - Scaleway API URL.
     default: 'https://account.scaleway.com'
     aliases: ['base_url']
 '''
@@ -67,8 +66,8 @@ EXAMPLES = '''
 
 RETURN = '''
 data:
-    description: This is only present when C(state=present)
-    returned: when C(state=present)
+    description: This is only present when I(state=present).
+    returned: when I(state=present)
     type: dict
     sample: {
         "ssh_public_keys": [