fix: allow classes to be reassigned (#11794)

.changeset/gentle-wasps-pull.md

@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: allow classes to be reassigned

packages/svelte/src/compiler/phases/scope.js

@@ -476,7 +476,7 @@ export function create_scopes(ast, root, allow_reactive_declarations, parent) {
 		SwitchStatement: create_block_scope,
 
 		ClassDeclaration(node, { state, next }) {
-			if (node.id) state.scope.declare(node.id, 'normal', 'const', node);
+			if (node.id) state.scope.declare(node.id, 'normal', 'let', node);
 			next();
 		},