Docs: Adds an example with try/catch. (#9672)

* Docs: Adds an example with try/catch.

Clarifies with an example that `return await` inside an error handler is allowed by this rule.

* Update no-return-await.md

Author: q42jaap

docs/rules/no-return-await.md

@@ -30,8 +30,16 @@ async function foo() {
   const x = await bar();
   return x;
 }
+
+async function foo() {
+  try {
+    return await bar();
+  } catch (error) {}
+}
 ```
 
+In the last example the `await` is necessary to be able to catch errors thrown from `bar()`.
+
 ## When Not To Use It
 
 If you want to use `await` to denote a value that is a thenable, even when it is not necessary; or if you do not want the performance benefit of avoiding `return await`, you can turn off this rule.