build(deps-dev): bump cspell to v8.15.4

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

Author: renovate[bot]

package.json

@@ -40,7 +40,7 @@
     "browser-sync": "3.0.3",
     "browserslist-lint": "0.3.3",
     "console-log-level": "1.4.1",
-    "cspell": "8.15.1",
+    "cspell": "8.15.4",
     "cssnano": "7.0.6",
     "dictionary-en": "4.0.0",
     "dprint": "0.47.2",