Update README.md

Author: asakew

Diff for: README.md

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 # offline-csso-optimizer
-[Live demo](https://w3-uz.github.io/offline-css-optimizer/)
+[Live demo](https://w3-uz.github.io/offline-css-optimizer/) / [Zip download](https://github.com/w3-uz/offline-css-optimizer/archive/refs/heads/main.zip)
+
 
 
 * CSS minifier with structural optimizations https://css.github.io/csso/csso.html
 * Orginal repo: https://github.com/css/csso
 
 CSSO (CSS Optimizer) is a CSS minifier. It performs three sort of transformations: cleaning (removing redundant), compression (replacement for shorter form) and restructuring (merge of declarations, rulesets and so on). As a result your CSS becomes much smaller. 
 
-[zip download](https://github.com/w3-uz/offline-css-optimizer/archive/refs/heads/main.zip)