refactor(@angular/build): fix linting errors for updated Sass processing

Author: clydin

packages/angular/build/src/tools/esbuild/stylesheets/sass-language.ts

@@ -23,7 +23,7 @@ function isSassException(error: unknown): error is Exception {
 
 export function shutdownSassWorkerPool(): void {
   if (sassWorkerPool) {
-    sassWorkerPool.close();
+    void sassWorkerPool.close();
     sassWorkerPool = undefined;
   } else if (sassWorkerPoolPromise) {
     void sassWorkerPoolPromise.then(shutdownSassWorkerPool);

packages/angular_devkit/build_angular/src/tools/webpack/configs/styles.ts

@@ -66,7 +66,7 @@ export async function getStylesConfig(wco: WebpackConfigOptions): Promise<Config
   extraPlugins.push({
     apply(compiler) {
       compiler.hooks.shutdown.tap('sass-worker', () => {
-        sassImplementation.close();
+        void sassImplementation.close();
       });
     },
   });