Bump autoprefixer-rails from 10.4.19.0 to 10.4.21.0

Bumps [autoprefixer-rails](https://github.com/ai/autoprefixer-rails) from 10.4.19.0 to 10.4.21.0.
- [Changelog](https://github.com/ai/autoprefixer-rails/blob/master/CHANGELOG.md)
- [Commits](ai/autoprefixer-rails@10.4.19.0...10.4.21.0)

---
updated-dependencies:
- dependency-name: autoprefixer-rails
  dependency-version: 10.4.21.0
  dependency-type: indirect
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Gemfile.lock

@@ -74,7 +74,7 @@ GEM
       uri (>= 0.13.1)
     addressable (2.8.7)
       public_suffix (>= 2.0.2, < 7.0)
-    autoprefixer-rails (10.4.19.0)
+    autoprefixer-rails (10.4.21.0)
       execjs (~> 2)
     base64 (0.2.0)
     benchmark (0.4.0)
@@ -434,7 +434,7 @@ CHECKSUMS
   activestorage (8.0.2) sha256=f83d221e0f06ae38f2200e55490bd155c76d0add330f6e300e8646048d672977
   activesupport (8.0.2) sha256=8565cddba31b900cdc17682fd66ecd020441e3eef320a9930285394e8c07a45e
   addressable (2.8.7) sha256=462986537cf3735ab5f3c0f557f14155d778f4b43ea4f485a9deb9c8f7c58232
-  autoprefixer-rails (10.4.19.0) sha256=ccd21f47e5a07a581c7d239025e0d8d06a005825e96e06f72382d818fe665f4e
+  autoprefixer-rails (10.4.21.0) sha256=71b48caf850fc25275abd96f0b1fdd51c82e1c9b99cd30085cacb05da9c70235
   base64 (0.2.0) sha256=0f25e9b21a02a0cc0cea8ef92b2041035d39350946e8789c562b2d1a3da01507
   benchmark (0.4.0) sha256=0f12f8c495545e3710c3e4f0480f63f06b4c842cc94cec7f33a956f5180e874a
   bigdecimal (3.1.9) sha256=2ffc742031521ad69c2dfc815a98e426a230a3d22aeac1995826a75dabfad8cc