Mark `RSpec/RedundantPredicateMatcher` as `Safe: false` #1784

Job	Run time
Test coverage	19s
Confirm config and documentation	9s
Edge RuboCop: internal_investigation	14s
Edge RuboCop: spec	22s
RSpec 4	27s
Ruby 2.7: internal_investigation	17s
Ruby 2.7: spec	16s
Ruby 3.0: internal_investigation	21s
Ruby 3.0: spec	23s
Ruby 3.1: internal_investigation	11s
Ruby 3.1: spec	22s
Ruby 3.2: internal_investigation	15s
Ruby 3.2: spec	25s
Ruby 3.3: internal_investigation	17s
Ruby 3.3: spec	18s
Ruby ruby-head: internal_investigation	13s
Ruby ruby-head: spec	19s
Ruby jruby-9.4: internal_investigation	14s
Ruby jruby-9.4: spec	16s
	5m 38s

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