Update dependency autoprefixer to v10.6.1 (#628)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package.json

@@ -79,7 +79,7 @@
     "devDependencies": {
         "@tryghost/shared-theme-assets": "2.7.4",
         "@tryghost/theme-translations": "^0.0.9",
-        "autoprefixer": "10.6.0",
+        "autoprefixer": "10.6.1",
         "beeper": "2.1.0",
         "cssnano": "9.0.4",
         "gscan": "6.6.1",