Update dependency postcss-preset-env to v9.5.6 (mastodon#29983)

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

yarn.lock

@@ -6481,14 +6481,14 @@ __metadata:
   languageName: node
   linkType: hard
 
-"css-blank-pseudo@npm:^6.0.1":
-  version: 6.0.1
-  resolution: "css-blank-pseudo@npm:6.0.1"
+"css-blank-pseudo@npm:^6.0.2":
+  version: 6.0.2
+  resolution: "css-blank-pseudo@npm:6.0.2"
   dependencies:
     postcss-selector-parser: "npm:^6.0.13"
   peerDependencies:
     postcss: ^8.4
-  checksum: 10c0/04f2dc1c39a429cb4958b60a9d00b03e29a78e3e55fe111b3a0660b7c6c478455d5907eda7c7a495cf72dbe83ae3c80b409e0468ca1ba5ccef992e69a8f49df8
+  checksum: 10c0/609303551c2a518ca23ed12fed43945ca4f7af04140da68a5536f5dc9d42f33412c13ac3fe5c616d7401a9e13a23d80b4cfa87149a45f94b244d8067bb11f3dd
   languageName: node
   linkType: hard
 
@@ -13620,8 +13620,8 @@ __metadata:
   linkType: hard
 
 "postcss-preset-env@npm:^9.5.2":
-  version: 9.5.5
-  resolution: "postcss-preset-env@npm:9.5.5"
+  version: 9.5.6
+  resolution: "postcss-preset-env@npm:9.5.6"
   dependencies:
     "@csstools/postcss-cascade-layers": "npm:^4.0.4"
     "@csstools/postcss-color-function": "npm:^3.0.13"
@@ -13654,7 +13654,7 @@ __metadata:
     "@csstools/postcss-unset-value": "npm:^3.0.1"
     autoprefixer: "npm:^10.4.19"
     browserslist: "npm:^4.22.3"
-    css-blank-pseudo: "npm:^6.0.1"
+    css-blank-pseudo: "npm:^6.0.2"
     css-has-pseudo: "npm:^6.0.3"
     css-prefers-color-scheme: "npm:^9.0.1"
     cssdb: "npm:^8.0.0"
@@ -13685,7 +13685,7 @@ __metadata:
     postcss-selector-not: "npm:^7.0.2"
   peerDependencies:
     postcss: ^8.4
-  checksum: 10c0/afc31fb75bc5e8e223d38fd34b81da08ee340818f5e392df1781728f2ff2a9dbc75e458673ce9f52deafefa90bbc99e0bd1453271498f5e02746c785180bad07
+  checksum: 10c0/21738ecac400cca9a96841959308538516ed00ca80d4c53beb20e080c7d963120fa77b7435b02e1beefc20043abce666419b81eccf6dacdc4298f540778c111d
   languageName: node
   linkType: hard