fix(fundings): Unset Region UrlSearchParam on click on structure

Author: annelhote

client/src/boards/financements-par-aap/pages/structures/components/structure-selector/index.tsx

@@ -133,6 +133,7 @@ export default function StructureSelector({ setStructures }) {
   const handleStructureChange = (selectedStructure?: string) => {
     if (selectedStructure) {
       searchParams.set("structure", selectedStructure);
+      searchParams.delete("region")
       setSearchParams(searchParams);
     }
   };