Fix Markdown Footnotes and Other Improvements (#173)

* fix some typos in Simplified Chinese translations

* add markdown-it-footnote

* use markdown-it-footnote | fix lint | fix Actions

package.json

@@ -74,11 +74,11 @@
     "make-fetch-happen": "^11.0.2",
     "markdown-it": "^13.0.1",
     "markdown-it-anchor": "^8.6.6",
+    "markdown-it-footnote": "^4.0.0",
     "markdown-it-link-attributes": "^4.0.1",
     "memoizepromise": "^2.0.0",
     "minimist": "^1.2.7",
     "morgan": "^1.10.0",
-    "node-sass": "^9.0.0",
     "plugin-error": "^2.0.1",
     "png-to-ico": "^2.1.8",
     "popper.js": "^1.16.0",
@@ -89,6 +89,7 @@
     "rollup": "^3.9.1",
     "rollup-plugin-react-svg": "^3.0.3",
     "rss": "^1.2.2",
+    "sass": "^1.90.0",
     "serve-index": "^1.9.1",
     "string-strip-html": "^8.3.0",
     "svg-dimensions": "^1.0.2",