fix descr

Author: jsstevenson

tests/unit/functions/test_ingest_vcf.py

@@ -120,7 +120,7 @@ def test_ingest_vcf_infocol_missing(
 def test_ingest_vcf_an_zero(
     stub_anyvar_client: BaseAnyVarClient, test_data_dir: Path, postgres_storage: Storage
 ):
-    """Test smooth handling of VCF that's missing one or more required INFO columns"""
+    """Test smooth handling of VCF row where AN=0"""
     ingest_vcf(
         test_data_dir / "vcf" / "vcf_an_0.vcf",
         stub_anyvar_client,