Update README.md

Signed-off-by: Fabiana  ⚡️ Campanari <113218619+FabianaCampanari@users.noreply.github.com>

Author: FabianaCampanari

README.md

@@ -275,7 +275,7 @@ This stage already counts towards the [**20 extension hours**](0, as it uses rea
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-### [**]Stage 2**]() – RESTful API Built on a SQL Database (Extension Requirement)
+### [**Stage 2**]() – RESTful API Built on a SQL Database (Extension Requirement)
 
 The **second subproject** in the briefing explicitly requires building an API: