chore(ci): update aws-s3tables-alpha labels (#37383)

### Reason for this change

Changelog did not label s3tables commits as part of alpha packages

### Description of changes

Correct labels for s3tables-alpha to include `s3tables` and `s3table`.

### Describe any new or updated permissions being added

No new permissions added

### Description of how you validated changes

Not validated locally, this is a CI change.

### 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)

----

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

Author: Abogical

.github/workflows/issue-label-assign.yml

@@ -287,7 +287,7 @@ env:
       {"area":"@aws-cdk/aws-location-alpha", "keywords":["aws-location", "aws-location-alpha"],"labels":["@aws-cdk/aws-location-alpha"]},
       {"area":"@aws-cdk/cli-lib-alpha", "keywords":["cli-lib", "cli-lib-alpha"],"labels":["@aws-cdk/cli-lib-alpha"]},
       {"area":"@aws-cdk/aws-applicationsignals-alpha", "keywords":["aws-applicationsignals", "aws-applicationsignals-alpha"],"labels":["@aws-cdk/aws-applicationsignals-alpha"]},
-      {"area":"@aws-cdk/aws-s3tables-alpha", "keywords":["aws-s3tables", "aws-s3tables-alpha"],"labels":["@aws-cdk/aws-s3tables-alpha"]},
+      {"area":"@aws-cdk/aws-s3tables-alpha", "keywords":["aws-s3tables", "aws-s3tables-alpha", "s3tables", "s3table"],"labels":["@aws-cdk/aws-s3tables-alpha"]},
       {"area":"@aws-cdk/aws-pipes-enrichments-alpha", "keywords":["aws-pipes-enrichments", "aws-pipes-enrichments-alpha"],"labels":["@aws-cdk/aws-pipes-enrichments-alpha"]},
       {"area":"@aws-cdk/aws-pipes-sources-alpha", "keywords":["aws-pipes-sources", "aws-pipes-sources-alpha"],"labels":["@aws-cdk/aws-pipes-sources-alpha"]},
       {"area":"@aws-cdk/aws-pipes-targets-alpha", "keywords":["aws-pipes-targets", "aws-pipes-targets-alpha"],"labels":["@aws-cdk/aws-pipes-targets-alpha"]},