random_string: add docs to use min_* (#10610)

* random_string: add docs to use min_*

* Update docs for min_* usage

Fixes: #10576

Signed-off-by: Abhijeet Kasurde <Akasurde@redhat.com>

* Review requests

Signed-off-by: Abhijeet Kasurde <Akasurde@redhat.com>

---------

Signed-off-by: Abhijeet Kasurde <Akasurde@redhat.com>

plugins/lookup/random_string.py

@@ -25,26 +25,30 @@ options:
     type: int
   upper:
     description:
-      - Include uppercase letters in the string.
+      - Possibly include uppercase letters in the string.
+      - To ensure atleast one uppercase letter, set O(min_upper) to V(1).
     default: true
     type: bool
   lower:
     description:
-      - Include lowercase letters in the string.
+      - Possibly include lowercase letters in the string.
+      - To ensure atleast one lowercase letter, set O(min_lower) to V(1).
     default: true
     type: bool
   numbers:
     description:
-      - Include numbers in the string.
+      - Possibly include numbers in the string.
+      - To ensure atleast one numeric character, set O(min_numeric) to V(1).
     default: true
     type: bool
   special:
     description:
-      - Include special characters in the string.
+      - Possibly include special characters in the string.
       - Special characters are taken from Python standard library C(string). See L(the documentation of
         string.punctuation,https://docs.python.org/3/library/string.html#string.punctuation)
         for which characters are used.
       - The choice of special characters can be changed to setting O(override_special).
+      - To ensure atleast one special character, set O(min_special) to V(1).
     default: true
     type: bool
   min_numeric: