add back go ref docs

Author: PatrickFarley

articles/cognitive-services/Computer-vision/index.yml

@@ -112,6 +112,9 @@ tools:
   - title: Python
     imageSrc: media/index/logo_python.svg
     url: /python/api/overview/azure/cognitiveservices/computervision
+  - title: Go
+    imageSrc: media/index/logo_go.svg
+    url: https://godoc.org/github.com/Azure/azure-sdk-for-go/services/cognitiveservices/v2.1/computervision
   - title: Java
     imageSrc: https://docs.microsoft.com/media/logos/logo_java.svg
     url: /java/api/com.microsoft.cognitiveservices.speech

articles/cognitive-services/Computer-vision/toc.yml

@@ -76,6 +76,8 @@ items:
       href: /javascript/api/@azure/cognitiveservices-computervision/
     - name: Python
       href: /python/api/overview/azure/cognitiveservices/computervision
+    - name: Go
+      href: https://godoc.org/github.com/Azure/azure-sdk-for-go/services/cognitiveservices/v2.1/computervision
     - name: Java
       href: /java/api/overview/azure/cognitiveservices/client/computervision
     - name: Azure CLI
@@ -144,6 +146,8 @@ items:
       href: /javascript/api/@azure/cognitiveservices-computervision
     - name: Python
       href: /python/api/overview/azure/cognitiveservices/computervision
+    - name: Go
+      href: https://godoc.org/github.com/Azure/azure-sdk-for-go/services/cognitiveservices/v2.1/computervision
     - name: Java
       href: /java/api/overview/azure/cognitiveservices/client/computervision
     - name: Azure CLI