fix image not showing (#137)

Author: benitav

architecture/architecture-overview.mdx

@@ -4,7 +4,7 @@ description: "The core components of PowerSync are the service and client SDKs"
 ---
 
 <Frame>
-  <img src="images/powersync-diagram-architecture-overview.png" />
+  <img src="/images/powersync-diagram-architecture-overview.png" />
 </Frame>
 
 The [PowerSync Service](/architecture/powersync-service) and client SDK operate in unison to keep client-side SQLite databases in sync with a backend database. Learn about their architecture: