Bump k6 version in MSI URL

Author: Ivan Mirić

src/data/markdown/docs/01 guides/01 Getting started/02 Installation.md

@@ -43,7 +43,7 @@ $ brew install k6
 
 ## Windows (MSI installer)
 
-Download the k6 installer from [here](https://dl.bintray.com/loadimpact/windows/k6-v0.30.0-amd64.msi).
+Download the k6 installer from [here](https://dl.bintray.com/loadimpact/windows/k6-v0.31.0-amd64.msi).
 
 ## Binaries