doc: use period consistently in man page

PR-URL: https://github.com/nodejs/node/pull/34939
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>

doc/node.1

@@ -79,7 +79,7 @@ Aborting instead of exiting causes a core file to be generated for analysis.
 Print source-able bash completion script for Node.js.
 .
 .It Fl -conditions Ar string
-Use custom conditional exports conditions
+Use custom conditional exports conditions.
 .Ar string
 .
 .It Fl -cpu-prof
@@ -105,7 +105,7 @@ The default is
 .
 .It Fl -cpu-prof-name
 File name of the V8 CPU profile generated with
-.Fl -cpu-prof
+.Fl -cpu-prof .
 .
 .It Fl -diagnostic-dir
 Set the directory for all diagnostic output files.
@@ -159,7 +159,7 @@ Enable experimental top-level
 keyword support in REPL.
 .
 .It Fl -experimental-specifier-resolution
-Select extension resolution algorithm for ES Modules; either 'explicit' (default) or 'node'
+Select extension resolution algorithm for ES Modules; either 'explicit' (default) or 'node'.
 .
 .It Fl -experimental-vm-modules
 Enable experimental ES module support in VM module.
@@ -208,7 +208,7 @@ The default is
 .
 .It Fl -heap-prof-name
 File name of the V8 heap profile generated with
-.Fl -heap-prof
+.Fl -heap-prof .
 .
 .It Fl -icu-data-dir Ns = Ns Ar file
 Specify ICU data load path.