readme: fix typo (#9)

README.md

@@ -1,7 +1,7 @@
 # boa - all snake, no venom
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+[![Go Report Card](https://goreportcard.com/badge/github.com/oncilla/boa)](https://goreportcard.com/report/github.com/oncilla/boa)
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@@ -107,7 +107,7 @@ func newGreet(pather CommandPather) *cobra.Command {
 ```
 
 Boa suggests to use the `SilenceErrors` and `SilenceUsage`.
-For more information, see: github.com/spf13/cobra/issues/340#issuecomment-374617413
+For more information, see: https://github.com/spf13/cobra/issues/340#issuecomment-374617413
 
 You now need to register the command with its parent. For the sake of this
 example, it is simply the root command. Update `my-app.go` with:
@@ -116,8 +116,8 @@ example, it is simply the root command. Update `my-app.go` with:
     cmd.AddCommand(
         newCompletion(cmd),
         newGreet(cmd),
-		newVersion(cmd),
-	)
+        newVersion(cmd),
+    )
 
 ```