Fixed a typo error in subgraph.cc (First Pull Request)
Thanks for your pull request! It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

View this [failed invocation](https://github.com/tensorflow/tensorflow/pull/61202/checks?check_run_id=14833853210) of the CLA check for more information.

For the most up to date status, view the checks section at the bottom of the pull request. > You will need to also change all callers of this.
> 
> Also, in general we don't accept 1-letter PR fixes. The amount of CI that needs to run is a cost that does not justify it

can you please tell me how to change all callers of this? how to locate the files where it has been called.  grep, use IDE, use codesearch tools (github also has a search). Hi @captainhaddock18 Can you please sign CLA. Thank you!
Fixed a typo error. Changed the spelling from "GetDelegateKernalName" to "GetDelegateKernelName"