Correct apk docu to not include spaces in package name (#8009)

* Correct apk docu to not include spaces in package name

* Update apk name docu as suggested in PR

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

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

plugins/modules/apk.py

@@ -35,7 +35,9 @@ options:
     default: false
   name:
     description:
-      - A package name, like V(foo), or multiple packages, like V(foo, bar).
+      - A package name, like V(foo), or multiple packages, like V(foo,bar).
+      - Do not include additional whitespace when specifying multiple packages as a string.
+        Prefer YAML lists over comma-separating multiple package names.
     type: list
     elements: str
   no_cache: