docs: update SUMMARY.md (#2040)

Author: cliraa

docs/SUMMARY.md

@@ -21,7 +21,7 @@
     * [Explorer](./2_architecture/components/6_explorer.md)
 * [Proof Aggregation Service](2_architecture/2_aggregation_mode.md)
     * [Deep Dive](2_architecture/agg_mode_components/1_deep_dive.md)
-* [Rollup-as-a-Service Platform](3_raas_platform.md)
+* [Rollup-as-a-Service Platform](2_architecture/3_raas_platform.md)
 
 ## Guides