fix(slidev/cli): #2230 indexHtml meta (#2232)

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

Author: daguanren21

packages/slidev/node/setups/indexHtml.ts

@@ -68,6 +68,7 @@ export default async function setupIndexHtml({ mode, entry, clientRoot, userRoot
           ...webFontsLink,
         ].filter(x => x),
         meta: [
+          { 'http-equiv': 'Content-Type', 'content': 'text/html; charset=UTF-8' },
           { property: 'slidev:version', content: version },
           { charset: 'slidev:entry', content: mode === 'dev' && slash(entry) },
           { name: 'description', content: description },