update vscode config option

vscode added support experimentally in 1.79, but used a different name for the option than in the final release. update it.

Author: jyn514

content/_index.md

@@ -323,11 +323,11 @@ Exoterm is a more up-to-date fork with sixel support, among other things: https:
 
 {{< supported >}}
 
-Must be enabled with `"terminal.integrated.experimentalImageSupport": true`.
+Must be enabled with `"terminal.integrated.enableImages": true`.
 
 Uses xterm.js with xterm-addon-image, related PR: https://github.com/microsoft/vscode/pull/182442
 
-From release 1.79: https://code.visualstudio.com/updates/v1_79#_images-in-the-terminal
+From release 1.80: https://code.visualstudio.com/updates/v1_80#_image-support
 
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