chore: fix typo in runtime.test.ts (#29865)

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Closes #<issue number here>.

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- [x] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

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packages/aws-cdk-lib/aws-lambda/test/runtime.test.ts

@@ -45,7 +45,7 @@ describe('runtime', () => {
     expect(runtime.bundlingDockerImage.image).toEqual('public.ecr.aws/sam/build-my-runtime-name');
   });
 
-  test('overridde to bundlingDockerImage points to the correct image', () => {
+  test('override to bundlingDockerImage points to the correct image', () => {
     // GIVEN
     const runtime = new lambda.Runtime('my-runtime-name', undefined, {
       bundlingDockerImage: 'my-docker-image',