Merge pull request #6240 from pmorie/docs

Add ApiVersion to doc example for remote API 1.12 /version

docs/sources/reference/api/docker_remote_api_v1.12.md

@@ -1165,6 +1165,7 @@ Show the docker version information
         Content-Type: application/json
 
         {
+             "ApiVersion":"1.12",
              "Version":"0.2.2",
              "GitCommit":"5a2a5cc+CHANGES",
              "GoVersion":"go1.0.3"