LibWeb: Initialize plain boolean in ClipboardItem::Representation

Author: https://github.com/trflynn89
Commit: 5fb5066e89
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/4548
Reviewed-by: https://github.com/shannonbooth

Libraries/LibWeb/Clipboard/ClipboardItem.h

@@ -34,7 +34,7 @@ class ClipboardItem : public Bindings::PlatformObject {
 public:
     struct Representation {
         String mime_type;              // The MIME type (e.g., "text/plain").
-        bool is_custom;                // Whether this is a web custom format.
+        bool is_custom { false };      // Whether this is a web custom format.
         GC::Ref<WebIDL::Promise> data; // The actual data for this representation.
     };