add note about GENCODE basic

Author: ch-kr

browser/help/topics/v4-hts.md

@@ -214,7 +214,7 @@ Row fields:
     - `VRS_Ends`: Interresidue coordinates used as the location ends for the GA4GH VRS Alleles corresponding to the values in the alleles column
     - `VRS_States`: The literal sequence states used for the GA4GH VRS Alleles corresponding to the values in the alleles column.
 - `vep`: Consequence annotations from Ensembl VEP version 105. More details about VEP output is described [here](https://ensembl.org/info/docs/tools/vep/vep_formats.html#output). Ensembl VEP was run using the LOFTEE plugin and information about the additional LOFTEE annotations can be found [here](https://github.com/konradjk/loftee).
-- `vep115`: Consequence annotations from Ensembl VEP version 115. Ensembl VEP was run using the LOFTEE plugin and information about the additional LOFTEE annotations can be found [here](https://github.com/konradjk/loftee).
+- `vep115`: Consequence annotations from Ensembl VEP version 115. Ensembl VEP was run using the LOFTEE plugin and information about the additional LOFTEE annotations can be found [here](https://github.com/konradjk/loftee). Note that Ensembl VEP 115 consequence annotations are only available for the [GENCODE basic](https://www.gencodegenes.org/pages/faq.html) set of transcripts.
 - `vqsr_results`: VQSR related variant annotations.
   - `AS_VQSLOD`: Allele-specific log-odds ratio of being a true variant versus being a false positive under the trained VQSR Gaussian mixture model.
   - `AS_culprit`: Allele-specific worst-performing annotation in the VQSR Gaussian mixture model.