change prettier-extension vscode setting name, tabSize to tabWidth (#…

…20407)

## Description 

the prettier-move in vscode setting, `tabWidth` label name is error, it
show the `tabSize`. So when I set the `tabSize`, format not work

in the source, the extension only read the `tabWidth` value, so need
change `tabWidth` to `tabWidth`

https://github.com/MystenLabs/sui/blob/main/external-crates/move/tooling/prettier-extension/src/extension.js#L110

## Test plan 

How did you test the new or updated feature?
yes

open the vscode settings, then find the menu that name is `prettierMove`
you can see the `Tab Size`, set it to 2,

![image](https://github.com/user-attachments/assets/d6876f79-5f9c-4cb7-9f29-f64aa2cb5c70)
 then format the move file, it not work

![image](https://github.com/user-attachments/assets/382a6b60-7e16-438e-8257-b0c0d6ad29a9)

but direct set the tabWidth, it work

![image](https://github.com/user-attachments/assets/a4579118-3f14-490c-aeb2-7d156a696550)


![image](https://github.com/user-attachments/assets/93166d25-dc0f-4cd6-b219-c4aee77bd376)

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external-crates/move/tooling/prettier-extension/package.json

@@ -38,10 +38,10 @@
 					"default": 100,
 					"description": "Set `printWidth` in prettier"
 				},
-				"prettierMove.tabSize": {
+				"prettierMove.tabWidth": {
 					"type": "number",
 					"default": 4,
-					"description": "Set `tabSize` in prettier"
+					"description": "Set `tabWidth` in prettier"
 				},
 				"prettierMove.useModuleLabel": {
 					"type": "boolean",