Update SQL extension to 1.0.15-preview

Functions.Templates/Templates/SqlInputBinding-CSharp/.template.config/template.json

@@ -42,7 +42,7 @@
           "ManualInstructions": [],
           "args": {
             "referenceType": "package",
-            "reference": "Microsoft.Azure.WebJobs.Extensions.Sql", "version": "0.1.483-preview",
+            "reference": "Microsoft.Azure.WebJobs.Extensions.Sql", "version": "1.0.15-preview",
             "projectFileExtensions": ".csproj"
           }
         },