docs: update description

Signed-off-by: Athan <[email protected]>

Author: kgryte

lib/node_modules/@stdlib/_tools/eslint/rules/tsdoc-declarations-doctest/README.md

@@ -20,7 +20,7 @@ limitations under the License.
 
 # tsdoc-declarations-doctest
 
-> [ESLint rule][eslint-rules] to ensure that return annotations in TSDoc examples match the actual output in TypeScript declaration files (`.d.ts`).
+> [ESLint rule][eslint-rules] to ensure that return annotations in TSDoc examples match the actual output in TypeScript declaration files (`*.d.ts`).
 
 <section class="intro">