(maint) - bump puppetlabs_spec_helper to 7.x #367

Job	Run time
spec (ruby 2.7) / spec	1m 2s
spec (ruby 3.2) / spec	43s
acceptance (ruby 2.7 \| ubuntu-latest) / acceptance	13m 35s
acceptance (ruby 3.2 \| ubuntu-latest) / acceptance	13m 6s
acceptance (ruby 3.2 \| windows-2019) / acceptance	40m 12s
acceptance (ruby 2.7 \| windows-2019) / acceptance	28m 46s
	1h 37m 24s

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