refactor: remove true from boolean attribute (#2579)

When using a boolean attribute in JSX, you can set the attribute value to true or omit the value. This helps to keep consistency in code.

Co-authored-by: deepsource-autofix[bot] <62050782+deepsource-autofix[bot]@users.noreply.github.com>

web/components/issues/select/label.tsx

@@ -49,7 +49,7 @@ export const IssueLabelSelect: React.FC<Props> = ({ setIsOpen, value, onChange,
                 <IssueLabelsList
                   labels={value.map((v) => issueLabels?.find((l) => l.id === v)) ?? []}
                   length={3}
-                  showLength={true}
+                  showLength
                 />
               </span>
             ) : (