Update Google Maps API key link in documentation

The link for obtaining a Google Maps API key has been updated to direct users to the correct page specifically for getting an API key, improving the relevance for prerequisites.

NOTE: This commit message is auto-generated using GitHub Copilot.

Author: gvreddy04

BlazorBootstrap.Demo.RCL/Components/Pages/Maps/GoogleMapDocumentation.razor

@@ -15,7 +15,7 @@
     <div>
         Before you start using the GoogleMap component in your project, you need an API key.
         Please follow the link below for detailed steps.
-        <b>Link:</b> <a href="https://developers.google.com/maps/documentation/javascript/adding-a-google-map#key" target="_blank">https://developers.google.com/maps/documentation/javascript/adding-a-google-map#key</a>.
+        <b>Link:</b> <a href="https://developers.google.com/maps/documentation/javascript/get-api-key?setupProd=prerequisites" target="_blank">https://developers.google.com/maps/documentation/javascript/get-api-key?setupProd=prerequisites</a>.
     </div>
 </Section>