fix: p2 item 17 search() case-insensitive match broken

Signed-off-by: habeck <habeck@us.ibm.com>

Author: tedhabeck

cpex/tools/catalog.py

@@ -593,7 +593,7 @@ def search(self, plugin_name: str | None) -> Optional[list[PluginManifest]]:
             self.load()
         for manifest in self.manifests:
             if plugin_name is not None:
-                if manifest.name.lower().count(plugin_name) > 0:
+                if manifest.name.lower().count(plugin_name.lower()) > 0:
                     matching.append(manifest)
                 elif plugin_name.lower() in manifest.tags:
                     matching.append(manifest)