Audit grammar in PEP policy editor

Problem

We need to make sure in Pipeline execution policy that the sentence with options are correct

Bug	Correct
	[ Override ] the .gitlab-ci.yml configuration with a pipeline execution file from [ location ]
	[Inject] the pipeline execution policy configuration file from [Select projects] into the .gitlab-ci.yml file.
	File reference (optional): [default branch] Add job name suffix: [On conflict / Never]