docs: update README images for AI diagnostics

- Replace 'coming-soon' placeholder image with AI diagnostics image in README files
- Ensure consistency across different language versions of the README

This update improves the visual representation of the AI diagnostics feature in the documentation, providing a more accurate and informative preview for users.

README-pt.md

@@ -84,7 +84,7 @@ https://github.com/KusionStack/karpor/assets/49401013/7cf31cc0-7123-42f6-8543-5a
       <b>Multi-Cluster e Multi-Nuvem/Nuvem Híbrida</b><br />Suporta nativamente Multi-Cluster e Multi-Nuvem/Nuvem Híbrida.
     </td>
     <td style="width: 60%; vertical-align: middle;">
-      <img src="https://kusionstack.io/karpor/assets/misc/coming-soon.jpeg" alt="Baixo Impacto" />
+      <img src="https://kusionstack.io/karpor/assets/ai/event-ai-diagnosis.png" alt="Baixo Impacto" />
     </td>
   </tr>
 </table>

README-zh.md

@@ -87,7 +87,7 @@ https://github.com/KusionStack/karpor/assets/49401013/7cf31cc0-7123-42f6-8543-5a
       <b>Kubernetes AIOps</b><br />利用 AI 驱动的洞察，自动化和优化 Kubernetes 管理
     </td>
     <td width="60%">
-      <kbd><img src="https://kusionstack.io/karpor/assets/misc/coming-soon.jpeg"  /></kbd>
+      <kbd><img src="https://kusionstack.io/karpor/assets/ai/event-ai-diagnosis.png"  /></kbd>
     </td>
   </tr>
 </table>

README.md

@@ -87,7 +87,7 @@ https://github.com/KusionStack/karpor/assets/49401013/7cf31cc0-7123-42f6-8543-5a
       <b>AIOps for Kubernetes</b><br />Automate and optimize Kubernetes management with AI-powered insights.
     </td>
     <td width="60%">
-      <kbd><img src="https://kusionstack.io/karpor/assets/misc/coming-soon.jpeg" /></kbd>
+      <kbd><img src="https://kusionstack.io/karpor/assets/ai/event-ai-diagnosis.png" /></kbd>
     </td>
   </tr>
 </table>
@@ -193,4 +193,4 @@ If you have any questions, feel free to reach out to us in the following ways:
 
 
 ## License
-[![FOSSA Status](https://app.fossa.com/api/projects/git%2Bgithub.com%2FKusionStack%2Fkarpor.svg?type=large)](https://app.fossa.com/projects/git%2Bgithub.com%2FKusionStack%2Fkarpor?ref=badge_large)
+[![FOSSA Status](https://app.fossa.com/api/projects/git%2Bgithub.com%2FKusionStack%2Fkarpor.svg?type=large)](https://app.fossa.com/projects/git%2Bgithub.com%2FKusionStack%2Fkarpor?ref=badge_large)