update broken image links

Author: santteegt

docs/pages/architecture/overview.mdx

@@ -1,6 +1,6 @@
 # Architecture Overview
 
-![architecture](https://raw.githubusercontent.com/raid-guild/gaianet-rag-api-pipeline/72403cc4503ce65da4e737eb8f68c03aa5772f44/architecture.png)
+![architecture](https://raw.githubusercontent.com/raid-guild/gaianet-rag-api-pipeline/refs/heads/main/docs/public/architecture.png)
 
 The diagram above illustrates the system architecture. When executing the `rag-api-pipeline` CLI, the tool performs the following steps: