Replace Tech Preview status with Experimental

Author: samkim

pages/mcp/authzed/spicedb-dev-mcp-server.mdx

@@ -3,7 +3,10 @@ import { Callout } from 'nextra/components'
 # SpiceDB Dev MCP Server
 
 <Callout type="info">
-  The SpiceDB Dev MCP server is available as a Tech Preview. Tech Preview features provide the earliest access to upcoming product innovations, enabling you to test functionality and provide feedback during the development process.
+  The SpiceDB Dev MCP server is available as Experimental.
+
+  Experimental functionality enables you to try features and provide feedback during the development process.
+  However, these features may change or be removed before reaching a stable release.
 </Callout>
 
 Run a local SpiceDB development environment directly in your AI coding assistant.