fix: upgrade autoprefixer from 10.4.14 to 10.4.15

Snyk has created this PR to upgrade autoprefixer from 10.4.14 to 10.4.15.

See this package in npm:
https://www.npmjs.com/package/autoprefixer

See this project in Snyk:
https://app.snyk.io/org/data.gov/project/22700983-7a0f-49aa-b664-c3f0abc51588?utm_source=github&utm_medium=referral&page=upgrade-pr

package.json

@@ -6,7 +6,7 @@
     "private": true,
     "dependencies": {
         "accessible-autocomplete": "^1.6.2",
-        "autoprefixer": "^10.4.14",
+        "autoprefixer": "^10.4.15",
         "browserify": "^17.0.0",
         "concurrently": "^6.5.1",
         "css-mqpacker": "^7.0.0",