Fix: Correct/upgrade dev dependency.

Author: bjones1

client/package.json5

@@ -67,7 +67,6 @@
         codemirror: '^6.0.2',
         mathjax: '^4.1.1',
         mermaid: '^11.13.0',
-        'npm-check-updates': '^19.6.5',
         'pdfjs-dist': '5.4.624',
         tinymce: '^8.3.2',
         'toastify-js': '^1.12.0',
@@ -90,6 +89,7 @@
         'eslint-plugin-prettier': '^5.5.5',
         globals: '^17.4.0',
         mocha: '^11.7.5',
+        'npm-check-updates': '^20.0.0',
         prettier: '^3.8.1',
         typescript: '^6.0.2',
         'typescript-eslint': '^8.57.2',