doc: fix REPLACEME for tls min/max protocol option
Fill in correct pr-url: value in the YAML changelog that was missing from https://github.com/nodejs/node/commit/f512f5ea138fe86e47c0179d5733044daf6f4fe6
Checklist
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
documentation is changed or added -
commit message follows commit guidelines