Align GLIDEIN_Site conventions with Factory Ops

Requested by TimC and JeffD

docs/resource-sharing/os-backfill-containers.md

@@ -46,8 +46,8 @@ In order to successfully start payload jobs:
    If you are using Docker to launch the container, this is done with the command line flag
    `-v /path/to/token:/etc/condor/tokens-orig.d/flock.opensciencegrid.org`.
    Replace `/path/to/token` with the full path to the token you obtained from the OSPool Token Registry.
-1. Set `GLIDEIN_Site` and `GLIDEIN_ResourceName` to match the site name and resource name that you registered in Topology,
-   respectively.
+1. Set `GLIDEIN_Site` and `GLIDEIN_ResourceName` to match the resource group name and resource name that you registered
+   in Topology, respectively.
 1. Set the `OSG_SQUID_LOCATION` environment variable to the HTTP address of your preferred Squid instance.
 1. _If providing NVIDIA GPU resources:_ Bind-mount `/etc/OpenCL/vendors`, read-only.
    If you are using Docker to launch the container, this is done with the command line flags