Fix RDoc detection

- Simplify detection, output would be consistent so this is less to match on, and remove negated identifier.

src/technologies.json

@@ -13206,7 +13206,7 @@
       "html": [
         "<link[^>]+href=\"[^\"]*rdoc-style\\.css",
         "Generated by <a[^>]+href=\"https?://rdoc\\.rubyforge\\.org[^>]+>RDoc</a> ([\\d.]*\\d)\\;version:\\1",
-        "<footer(?:(?!<\\/footer>)[^]){1,500}<p>\\s*Generated by <a href=\"https:\\/\\/ruby\\.github\\.io\\/rdoc\\/\">RDoc<\\/a> ([\\d.]*\\d)\\;version:\\1"
+        "Generated by <a href=\"https:\\/\\/ruby\\.github\\.io\\/rdoc\\/\">RDoc<\\/a> ([\\d.]*\\d)\\;version:\\1"
       ],
       "icon": "RDoc.png",
       "implies": "Ruby",