fix(nvm): omit message when silent-autoload is enabled (#11371)

plugins/nvm/nvm.plugin.zsh

@@ -65,7 +65,7 @@ if zstyle -t ':omz:plugins:nvm' autoload; then
     local node_version="$(nvm version)"
     local nvmrc_path="$(nvm_find_nvmrc)"
     local nvm_silent=""
-    zstyle -t ':omz:plugins:nvm' silent-autoload && _nvm_silent="--silent"
+    zstyle -t ':omz:plugins:nvm' silent-autoload && nvm_silent="--silent"
 
     if [[ -n "$nvmrc_path" ]]; then
       local nvmrc_node_version=$(nvm version $(cat "$nvmrc_path" | tr -dc '[:print:]'))
@@ -76,7 +76,10 @@ if zstyle -t ':omz:plugins:nvm' autoload; then
         nvm use $nvm_silent
       fi
     elif [[ "$node_version" != "$(nvm version default)" ]]; then
+      if [[ -z $nvm_silent ]]; then
         echo "Reverting to nvm default version"
+      fi
+
       nvm use default $nvm_silent
     fi
   }