minor #5217 Update _payload-option.rst.inc (bvleur)

This PR was submitted for the 2.7 branch but it was merged into the 2.6 branch instead (closes #5217).

Discussion
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Update _payload-option.rst.inc

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | 2.6+
| Fixed tickets | n/a

Just some minor changes to the documentation of the payload option for constraints

Commits
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c8c3c99 Update _payload-option.rst.inc

Author: wouterj

reference/constraints/_payload-option.rst.inc

@@ -8,9 +8,9 @@ payload
 
 This option can be used to attach arbitrary domain-specific data to a constraint.
 The configured payload is not used by the Validator component, but its processing
-is completely up to.
+is completely up to you.
 
-For example, you may want to used
+For example, you may want to use
 :doc:`several error levels </cookbook/validation/severity>` to present failed
-constraint differently in the front-end depending on the severity of the
+constraints differently in the front-end depending on the severity of the
 error.