docs(architecture): update icon name for database in exemple

Author: gbremond

docs/syntax/architecture.md

@@ -87,7 +87,7 @@ creates the service identified as `database`, using the icon `db`, with the labe
 If the service belongs to a group, it can be placed inside it through the optional `in` keyword
 
 ```
-service database(db)[Database] in private_api
+service database(database)[Database] in private_api
 ```
 
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