fix anchor link

Author: ggailey777

articles/azure-functions/functions-bindings-register.md

@@ -60,7 +60,7 @@ To manually install binding extensions:
 
 1. Validate your app functionality locally and then redeploy your project, including `extensions.csproj`, to your function app in Azure.  
 
-As soon as possible, you should [switch your app back to using the latest supported extension bundle](./extension-bundles.md#defining-an-extension-bundle-reference).
+As soon as possible, you should [switch your app back to using the latest supported extension bundle](./extension-bundles.md#define-an-extension-bundle-reference).
 ::: zone-end
 
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