fix: added title to error page

Author: raphael-goetz

docs/errors.md

@@ -1,3 +1,8 @@
+---
+title: Taurus Error Table
+---
+
+
 # Taurus Runtime Error Codes
 
 This document is the canonical catalog for runtime error codes emitted by Taurus runtime crates (`taurus-core` and `taurus-provider`).

docs/index.mdx

@@ -14,4 +14,5 @@ It handles flow execution requests and requests single node executions from Acti
 If you want to work on or with Taurus, start here:
 
 - **[Setup Guide](installation.mdx)**: install and configure Taurus for local or containerized use, with Aquila required for dynamic mode.
-- **[Development Guide](dev.md)**: runtime architecture
+- **[Development Guide](dev.md)**: runtime architecture.
+- **[Error Table](errors.md)**: table of possible runtime errors.