Update dependency cssnano to v8 (#1397)

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

Author: renovate[bot]

package.json

@@ -53,7 +53,7 @@
 		"create-pwa": "2.7.0",
 		"critical": "7.2.1",
 		"css-loader": "7.1.4",
-		"cssnano": "7.1.9",
+		"cssnano": "8.0.0",
 		"eslint": "10.3.0",
 		"eslint-config-prettier": "10.1.8",
 		"eslint-config-recommended": "4.1.0",