docs: fix all domain URLs — pezkuwichain.app → pezkuwichain.io, app link → app.pezkuwichain.io

docs/contributor/CONTRIBUTING.md

@@ -167,7 +167,7 @@ with the mentor offering their support on that larger task.
 ### Issues
 
 If what you are looking for is an answer rather than proposing a new feature or fix, search
-[https://exchange.pezkuwichain.app](https://exchange.pezkuwichain.app/) to see if an post already exists, and ask if
+[https://exchange.pezkuwichain.io](https://exchange.pezkuwichain.io/) to see if an post already exists, and ask if
 not. Please do not file support issues here.
 
 Before opening a new issue search to see if a similar one already exists and leave a comment that you also experienced

docs/whitepaper/whitepaper.md

@@ -180,7 +180,7 @@ The project operates under the Kurdistan Talent Institute License. It is a utili
 ### Official Channels
 *   **Website:** `https://pezkuwichain.io`
 *   **GitHub:** `https://github.com/pezkuwichain/pezkuwi-sdk`
-*   **Documentation:** `https://docs.pezkuwichain.app`
+*   **Documentation:** `https://docs.pezkuwichain.io`
 *   **Block Explorer:** `https://explorer.pezkuwichain.io`
 
 ### Email Contacts