build(deps): bump the tailwindcss group across 1 directory with 2 updates (#3426)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

src/Elastic.Documentation.Site/package-lock.json

@@ -64,7 +64,7 @@
     "@eslint/js": "10.0.1",
     "@parcel/reporter-bundle-analyzer": "2.16.4",
     "@parcel/transformer-svg-react": "2.16.1",
-    "@tailwindcss/postcss": "4.2.4",
+    "@tailwindcss/postcss": "4.3.0",
     "@testing-library/jest-dom": "6.9.1",
     "@testing-library/react": "16.3.2",
     "@testing-library/user-event": "14.6.1",
@@ -130,7 +130,7 @@
     "lodash": "^4.17.23",
     "marked": "17.0.6",
     "select-dom": "9.5.0",
-    "tailwindcss": "4.2.4",
+    "tailwindcss": "4.3.0",
     "tippy.js": "6.3.7",
     "ua-parser-js": "2.0.9",
     "uuid": "14.0.0",