Using js null instead of Java Null in JSON api docs

Author: aulme

docs/endpoints/post-identity-map.md

@@ -174,7 +174,7 @@ For successfully mapped DII, the mapped object includes the properties shown in
 | Property | Data Type  | Description                                                                                                                           |
 |:---------|:-----------|:--------------------------------------------------------------------------------------------------------------------------------------|
 | `u`      | string     | The raw UID2 corresponding to the email or phone number provided in the request.                                                                     |
-| `p`      | string     | One of the following:<ul><li>If the current raw UID2 has been rotated in the last 90 days: the previous value.</li><li>If the current raw UID2 is older than 90 days: `Null`.</li></ul> |
+| `p`      | string     | One of the following:<ul><li>If the current raw UID2 has been rotated in the last 90 days: the previous value.</li><li>If the current raw UID2 is older than 90 days: `null`.</li></ul> |
 | `r`      | number     | The Unix timestamp (in milliseconds) that indicates when the raw UID2 might be refreshed. The raw UID2 is guaranteed to be valid until this timestamp. |
 
 For unsuccessfully mapped input values, the mapped object includes the properties shown in the following table.

i18n/ja/docusaurus-plugin-content-docs/current/endpoints/post-identity-map.md

@@ -178,7 +178,7 @@ For successfully mapped DII, the mapped object includes the properties shown in
 | Property | Data Type  | Description                                                                                                                           |
 |:---------|:-----------|:--------------------------------------------------------------------------------------------------------------------------------------|
 | `u`      | string     | The raw UID2 corresponding to the email or phone number provided in the request.                                                                     |
-| `p`      | string     | One of the following:<ul><li>If the current raw UID2 has been rotated in the last 90 days: the previous value.</li><li>If the current raw UID2 is older than 90 days: `Null`.</li></ul> |
+| `p`      | string     | One of the following:<ul><li>If the current raw UID2 has been rotated in the last 90 days: the previous value.</li><li>If the current raw UID2 is older than 90 days: `null`.</li></ul> |
 | `r`      | number     | The Unix timestamp (in milliseconds) that indicates when the raw UID2 might be refreshed. The raw UID2 is guaranteed to be valid until this timestamp. |
 
 For unsuccessfully mapped input values, the mapped object includes the properties shown in the following table.