Revert to Stacks 2.5.4

2.5.5 has a regression where the a.s-btn:visited style looks bad.
I can update again when they fix it.
https://github.com/StackExchange/Stacks/pull/1879

package-lock.json

@@ -18,7 +18,7 @@
         "@cloudrac3r/pngjs": "^7.0.3",
         "@cloudrac3r/pug": "^4.0.4",
         "@cloudrac3r/turndown": "^7.1.4",
-        "@stackoverflow/stacks": "^2.5.7",
+        "@stackoverflow/stacks": "^2.5.4",
         "@stackoverflow/stacks-icons": "^6.0.2",
         "ansi-colors": "^4.1.3",
         "better-sqlite3": "^11.1.2",
@@ -926,9 +926,9 @@
       "dev": true
     },
     "node_modules/@stackoverflow/stacks": {
-      "version": "2.7.0",
-      "resolved": "https://registry.npmjs.org/@stackoverflow/stacks/-/stacks-2.7.0.tgz",
-      "integrity": "sha512-nn4tow6oTsYlpKwOcpPeKclFMvn0Py+rWCZppRWqcEVl9w2+U+nU7QyKsLzySvSFgXoo5hrBPWp5t7AlNVmF0A==",
+      "version": "2.5.4",
+      "resolved": "https://registry.npmjs.org/@stackoverflow/stacks/-/stacks-2.5.4.tgz",
+      "integrity": "sha512-k11SesaE+bZXNoa7IDinkpmu1BgVq7xIV1Gl1fZ5SM00hPi2S/vCyjIupLvJbSt1PAJTlnpBoUIM1ubb0Y7qFg==",
       "license": "MIT",
       "dependencies": {
         "@hotwired/stimulus": "^3.2.2",