buffer: use correct name for custom inspect symbol
Checklist
-
make -j8 test
passes (in only 3 hours!) -
tests and/or benchmarks are included -
commit message follows commit guidelines
Affected core subsystem(s)
buffer
Description of change
59714cb7 introduced the util.inspect.custom
symbol, but it was exported as customInspectSymbol
by internal/util.js
and referenced as inspectSymbol
by buffer.js
.