refactor(tests): improve error handling in BuildPage

### Summary
- Updated the error handling in the `BuildPage` class by changing the catch block to use a more concise variable name (`_error`), enhancing code readability without altering functionality.

### Impact
This change simplifies the error handling logic, making it clearer while maintaining the existing behavior of logging when the tutorial is not shown or already dismissed.

### Testing
- No functional tests were affected; existing tests continue to pass successfully.

autogpt_platform/frontend/src/tests/pages/build.page.ts

@@ -27,7 +27,7 @@ export class BuildPage extends BasePage {
       await this.page
         .getByRole("button", { name: "Skip Tutorial", exact: true })
         .click({ timeout: 3000 });
-    } catch (error) {
+    } catch (_error) {
       console.info("Tutorial not shown or already dismissed");
     }
   }