src: fix performance-faster-string-find in node_report.cc
See https://ci.nodejs.org/job/node-clang-tidy/7/console.
cc @richardlau @refack
Not sure why not caught by my clang-tidy, which version is Jenkins using ?
Checklist
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
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