Update README.md

Signed-off-by: Tae Chae <64792897+taechae@users.noreply.github.com>

README.md

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 Google [Artifact Analysis (AA)](https://cloud.google.com/artifact-analysis/docs/artifact-analysis) service data import utility, supports OSS vulnerability scanner reports, SLSA provenance, and sigstore attestations.
 
-AACTL is a tool that allows Google Cloud customers who use Artifact Registry to ingest vulnerabilities detected by supported scanning tools.  Once ingested, vulnerabilities will be stored & managed alongside vulnerabilities detected by Artifact Analysis. Vulnerabilities are viewable within Artifact Registry UI, SDS Security Insights, gcloud, and Artifact Analysis API (Container Analysis).  
+AACTL is a sample tool that shows Google Cloud customers who use Artifact Registry how they can ingest vulnerabilities detected by supported scanning tools into Artifact Analysis.  Once ingested, vulnerabilities will be stored & managed alongside vulnerabilities detected by Artifact Analysis. Vulnerabilities are viewable within Artifact Registry UI, SDS Security Insights, gcloud, and Artifact Analysis API (Container Analysis).
 
 AACTL can also ingest SLSA Build Provenance generated by [SLSA GitHub Generator](https://github.com/slsa-framework/slsa-github-generator).