doc: use single quotes in --tls-cipher-list
Currently, running the example code will produce the following error in bash:
$ node --tls-cipher-list="ECDHE-RSA-AES128-GCM-SHA256:!RC4" server.js
bash: !RC4: event not found
This commit changes the two examples to use single quotes to avoid the shell from trying to interpret '!' as the history command.
Checklist
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
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