docs(object-storage): clarification int-fix-object-storage (#4508)

* fix(object-storage): make clear that value is a _default_ value

* fix(object-storage): remove external link that adds no value

The concept has been explained before. Furthermore, it leads to a
Wikipedia page which, in this case, doesn't bring any valuable
information (`syntax` or `version` are not mentioned in this page).

* fix(object-storage): list all possible values for policy version

* fix(object-storage): correct type for Version

Also, don't list the deprecated value "2012-10-17" as we really don't want
customers to use this value

Author: ahamez

pages/object-storage/api-cli/bucket-policy.mdx

@@ -44,16 +44,16 @@ Bucket policies use a JSON-based access policy language, and are composed of str
 ### Version
 
 **Description**
-: [IAM](https://en.wikipedia.org/wiki/Identity_management) syntax version
+: IAM syntax version
 
 **Required**
 : Yes
 
 **Type**
-: const
+: string
 
 **Value**
-: "2023-04-17"
+: `"2023-04-17"`
 
 **Sample**:
 
@@ -622,4 +622,4 @@ Bucket policies use a JSON-based access policy language, and are composed of str
 - `DateLessThan`
 - `DateLessThanEquals`
 
-Refer to our [dedicated documentation](/object-storage/api-cli/manage-bucket-permissions-ip/) for more information on managing bucket permissions for IP addresses or ranges of IP.
+Refer to our [dedicated documentation](/object-storage/api-cli/manage-bucket-permissions-ip/) for more information on managing bucket permissions for IP addresses or ranges of IP.