Update nasa-heasarc.yaml

I indented the XRISM entry one character too few

Author: DavidT3

datasets/nasa-heasarc.yaml

@@ -178,10 +178,10 @@ Resources:
    Region: us-east-1
    Type: S3 Bucket
 
-- Description: "The [XRISM Mission](https://heasarc.gsfc.nasa.gov/docs/heasarc/missions/xrism.html) Data Archive.  Total size > 1 TB."
-  ARN: arn:aws:s3:::nasa-heasarc/xrism/data/obs/
-  Region: us-east-1
-  Type: S3 Bucket
+ - Description: "The [XRISM Mission](https://heasarc.gsfc.nasa.gov/docs/heasarc/missions/xrism.html) Data Archive.  Total size > 1 TB."
+   ARN: arn:aws:s3:::nasa-heasarc/xrism/data/obs/
+   Region: us-east-1
+   Type: S3 Bucket
 
 DataAtWork:
   Tutorials: