doc: fix typo / over-abbreviation

PR-URL: #10036

doc/misc/npm-scripts.md

@@ -210,7 +210,7 @@ above.
   by simply describing your package appropriately.  In general, this
   will lead to a more robust and consistent state.
 * Inspect the env to determine where to put things.  For instance, if
-  the `npm_config_binroot` environ is set to `/home/user/bin`, then
+  the `npm_config_binroot` environment variable is set to `/home/user/bin`, then
   don't try to install executables into `/usr/local/bin`.  The user
   probably set it up that way for a reason.
 * Don't prefix your script commands with "sudo".  If root permissions