chore: update repository configs (#1758)

.github/ISSUE_TEMPLATE/bug_report.md

@@ -30,3 +30,5 @@ You can use https://sli.dev/new to create a new project to reproduce the issue.
 - Slidev version:
 - Browser:
 - OS:
+
+If you are using Slidev globally (i.e. `npx slidev` or `npm i -g slidev`), please try to reproduce the issue in a local project (i.e. `npm create slidev@latest`).

.vscode/extensions.json

@@ -4,7 +4,7 @@
     "Vue.volar",
     "antfu.iconify",
     "dbaeumer.vscode-eslint",
-    "voorjaar.windicss-intellisense",
+    "antfu.unocss",
     "csstools.postcss"
   ]
 }