[Chapel Merge] Fix graph file for lsu-heat perf tests

Branch: refs/heads/main
Revision: 368b976810e58573cf1c71503e23bc9c1402d308
Author: jeremiah-corrado
Link: Fix graph file for lsu-heat perf tests by jeremiah-corrado · Pull Request #25589 · chapel-lang/chapel · GitHub
Log Message:
Fix graph file for lsu-heat perf tests (#25589)

Fix the perfkeys line in the graph file added
here,
which was incorrectly camel-cased.

[ trivial - not reviewed ]

Compare: Comparing 9a5b9f75cbbefd236f14f877a7531ac53cf3570f...e33f492687ebce264b0e0ea1234b66f2a4e8dc2e · chapel-lang/chapel · GitHub

Diff:
M test/studies/lsuHeat/heat.graph
https://github.com/chapel-lang/chapel/pull/25589.diff