Bump docs install version to v0.6.2 (#475)

Bump docs install version to v0.6.2

docs/installation.md

@@ -86,7 +86,7 @@ save it as `/usr/local/bin/ignite` and make it executable.
 To install Ignite from the command line, follow these steps:
 
 ```bash
-export VERSION=v0.6.0
+export VERSION=v0.6.2
 export GOARCH=$(go env GOARCH 2>/dev/null || echo "amd64")
 
 for binary in ignite ignited; do
@@ -106,8 +106,9 @@ If the installation was successful, the `ignite` command should now be available
 
 ```console
 $ ignite version
-Ignite version: version.Info{Major:"0", Minor:"6", GitVersion:"v0.6.0", GitCommit:"be96924f7860992f348cd15ed46ee2c064313153", GitTreeState:"clean", BuildDate:"2019-08-26T14:36:21Z", GoVersion:"go1.12.7", Compiler:"gc", Platform:"linux/amd64"}
-Firecracker version: v0.17.0
+Ignite version: version.Info{Major:"0", Minor:"6", GitVersion:"v0.6.2", GitCommit:"...", GitTreeState:"clean", BuildDate:"...", GoVersion:"...", Compiler:"gc", Platform:"linux/amd64"}
+Firecracker version: v0.18.0
+Runtime: containerd
 ```
 
 Now you can continue with the [Getting Started Walkthrough](usage.md).