docs(codepipeline): fix typo (#33209)

### Issue # (if applicable)

None

### Description of changes

Fixed typo in code comment.

### Checklist
- [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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*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: andyu17

packages/aws-cdk-lib/aws-codepipeline/lib/private/rich-action.ts

@@ -110,7 +110,7 @@ function sameEnv(env1: ResourceEnvironment, env2: ResourceEnvironment) {
  * Whether two string probably contain the same environment dimension (region or account)
  *
  * Used to compare either accounts or regions, and also returns true if both
- * are unresolved (in which case both are expted to be "current region" or "current account").
+ * are unresolved (in which case both are expected to be "current region" or "current account").
  */
 function sameEnvDimension(dim1: string, dim2: string) {
   return [TokenComparison.SAME, TokenComparison.BOTH_UNRESOLVED].includes(Token.compareStrings(dim1, dim2));