doc: use uppercase on windows path

Author: himself65

doc/api/fs.md

@@ -152,8 +152,8 @@ fs.open(Buffer.from('/open/some/file.txt'), 'r', (err, fd) => {
 
 On Windows, Node.js follows the concept of per-drive working directory. This
 behavior can be observed when using a drive path without a backslash. For
-example `fs.readdirSync('c:\\')` can potentially return a different result than
-`fs.readdirSync('c:')`. For more information, see
+example `fs.readdirSync('C:\\')` can potentially return a different result than
+`fs.readdirSync('C:')`. For more information, see
 [this MSDN page][MSDN-Rel-Path].
 
 ### URL object support

doc/api/path.md

@@ -56,8 +56,8 @@ path.posix.basename('/tmp/myfile.html');
 
 On Windows Node.js follows the concept of per-drive working directory.
 This behavior can be observed when using a drive path without a backslash. For
-example, `path.resolve('c:\\')` can potentially return a different result than
-`path.resolve('c:')`. For more information, see
+example, `path.resolve('C:\\')` can potentially return a different result than
+`path.resolve('C:')`. For more information, see
 [this MSDN page][MSDN-Rel-Path].
 
 ## `path.basename(path[, ext])`