doc: fixed formatting issue in cli docs

Removed some bad escape characters

PR-URL: #13808
Fixes: #13805
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Timothy Gu <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Tobias Nießen <[email protected]>
Reviewed-By: Yuta Hiroto <[email protected]>
Reviewed-By: Michael Dawson <[email protected]>
Reviewed-By: Gibson Fahnestock <[email protected]>

Author: Chris Young

doc/api/cli.md

@@ -359,7 +359,7 @@ added: v6.11.0
 
 Load an OpenSSL configuration file on startup. Among other uses, this can be
 used to enable FIPS-compliant crypto if Node.js is built with `./configure
-\-\-openssl\-fips`.
+--openssl-fips`.
 
 If the [`--openssl-config`][] command line option is used, the environment
 variable is ignored.