update histologies for IDH mutant tumors

[jharenza]

Purpose/implementation Section

What scientific question is your analysis addressing?

I inadvertently missed the PNOC IDH mutant sample when I updated the cancer_group to DIPG. This should remain as HGG. This actually doesn't change the circos plot because it was one polyA sample, so the impact may be minimal but would impact things such as survival and oncoprint potentially.

What was your approach?

What GitHub issue does your pull request address?

Directions for reviewers. Tell potential reviewers what kind of feedback you are soliciting.

Which areas should receive a particularly close look?

Is there anything that you want to discuss further?

Is the analysis in a mature enough form that the resulting figure(s) and/or table(s) are ready for review?

Results

What types of results are included (e.g., table, figure)?

What is your summary of the results?

Reproducibility Checklist

• [ ] The dependencies required to run the code in this pull request have been added to the project Dockerfile.

Documentation Checklist

• [ ] This analysis module has a README and it is up to date.
• [ ] The analytical code is documented and contains comments.

[jharenza]

I have updated this file on S3.