Updated for TagHelperOutput.SuppressContent method name typo fix

- #1553

Author: DamianEdwards

src/Microsoft.AspNet.Mvc.TagHelpers/EnvironmentTagHelper.cs

@@ -55,7 +55,7 @@ public override void Process(TagHelperContext context, TagHelperOutput output)
             }
 
             // No matching environment name found, suppress all output
-            output.SupressOutput();
+            output.SuppressOutput();
         }
     }
 }