fix typo in FourLeptonMassFilter.cxx

fix typo in FourLeptonMassFilter.cxx

This merge request affects 1 package:

• Generators/GeneratorFilters

This merge request affects 1 file:

• Generators/GeneratorFilters/src/FourLeptonMassFilter.cxx

added Generators master review-pending-level-1 labels

The system determined that CI tests (with names matching "^CITest_Trigger.*$") are not needed for this code change. They are not run. This is not an indicator to restart the job.

CI Result FAILURE (hash be9862c7)

	Athena	AthGeneration
externals
cmake
make
tests

Full details available on this CI monitor view. Check the JIRA CI status board for known problems
Athena: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 62597]

added review-approved label

removed review-pending-level-1 label

merged

mentioned in commit 5854346f

added sweep:ignore label