doc: fix -C flag usage

ref
40eb3b79f1

PR-URL: #46388
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Harshitha K P <harshitha014@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

Author: sxzz

doc/api/cli.md

@@ -169,7 +169,7 @@ $ node --completion-bash > node_bash_completion
 $ source node_bash_completion
 ```
 
-### `-C=condition`, `--conditions=condition`
+### `-C condition`, `--conditions=condition`
 
 <!-- YAML
 added:
@@ -190,7 +190,7 @@ The default Node.js conditions of `"node"`, `"default"`, `"import"`, and
 For example, to run a module with "development" resolutions:
 
 ```console
-$ node -C=development app.js
+$ node -C development app.js
 ```
 
 ### `--cpu-prof`