fix(deps): update dependency react-syntax-highlighter to v15.6.6

Author: renovate[bot]

package.json

@@ -63,7 +63,7 @@
     "react-dom": "19.2.3",
     "react-intersection-observer": "9.16.0",
     "react-markdown": "9.0.1",
-    "react-syntax-highlighter": "15.6.1",
+    "react-syntax-highlighter": "15.6.6",
     "react-textarea-autosize": "8.5.4",
     "remark-gfm": "4.0.0",
     "resumable-stream": "^2.2.10",