chore: Fix rust version docs and readme (#307)

Author: NicoMolinaOZ

README.md

@@ -152,7 +152,7 @@ openzeppelin-monitor/
 
 #### Prerequisites
 
-- **Rust MSRV: 1.86** or later
+- **Rust 2021 edition**, version `1.86` or later.
 - **Git** for version control
 - **Python/pip** for pre-commit hooks
 

docs/modules/ROOT/pages/index.adoc

@@ -39,7 +39,7 @@ To get started immediately, see xref:quickstart.adoc[Quickstart].
 
 === Prerequisites
 
-* **Rust** 2021 edition or later
+* Use **Rust 2021 edition**, version `1.86` or later.
 * **Docker** (optional, for containerized deployment)
 
 === Local Installation