Installing jdk

The Dictionary App Builder installation instructions tells me to install Java Development Kit (jdk), amazon-corretto-8.212.04.2-1-windows-x86.msi.
But it downloads as amazon-corretto-8.212.04.2-1-windows-x86-jdk.zip.sig.
I can not open this file. I have tried various recommended file viewers but can’t open the file. How do I open this file?

You clicked on the word Download that I have put a red X over. You want to download the one highlighted in yellow.

Thanks very much. My poor observation.