fix: [IOPID-2132] Centring the name of the user in the identification…

… modal (#6098)

## List of changes proposed in this pull request
- Centring the name of the user in the identification modal 

<p>

| Old screen (not centered) | New screen (centered) |
| - | - |
| <img width="250" alt="Screenshot 2024-08-07 alle 16 38 29"
src="https://github.com/user-attachments/assets/645f2166-bfb1-48cb-ab72-ac56e1ad5843"/>
| <img width="250" alt="Screenshot 2024-08-07 alle 16 35 21"
src="https://github.com/user-attachments/assets/910a052c-7070-4157-9358-4b3eb86f34ea">
|

</p>

## How to test
Run the application, close the app and re open it. You will see this
screen.
If you want to see fastly if this modification works, you can change the
name at [this line

](https://github.com/pagopa/io-app/blob/906c5efc713bfab0230de676739a2b66d10dbb44/ts/screens/modal/IdentificationModal.tsx#L232)
and use some long name

ts/screens/modal/IdentificationModal.tsx

@@ -399,7 +399,9 @@ const IdentificationModal = () => {
               )}
               <View accessible ref={headerRef} style={IOStyles.alignCenter}>
                 <VSpacer size={8} />
-                <H2 color={"white"}>{titleLabel}</H2>
+                <H2 color={"white"} style={{ textAlign: "center" }}>
+                  {titleLabel}
+                </H2>
                 <VSpacer size={8} />
                 <IdentificationInstructionsComponent
                   biometricType={biometricType}