Fix import of the softAssert library

[segfaultincoming]

Depending on your platform and configuration, it is possible that the softAssert fails to be imported, due to missing .js extension:

2025-06-02T10:26:27.134Z ERROR @wdio/config:ConfigParser: Failed loading configuration file: file:///C:/Path/To/Repo/wdio.conf.js: Cannot find module 'C:\Path\To\Repo\node_modules\expect-webdriverio\lib\softAssert' imported from C:\Path\To\Repo\node_modules\expect-webdriverio\lib\softAssertService.js
Error [ERR_MODULE_NOT_FOUND]: Cannot find module 'C:\Path\To\Repo\node_modules\expect-webdriverio\lib\softAssert' imported from C:\Path\To\Repo\node_modules\expect-webdriverio\lib\softAssertService.js

Imports with extensions are used everywhere in the project, so they should be used here as well.

[linux-foundation-easycla]

• ✅login: segfaultincoming / (dc0f95b)

The committers listed above are authorized under a signed CLA.

[christian-bromann]

👍

[wdio-bot]

Hey segfaultincoming 👋

Thank you for your contribution to WebdriverIO! Your pull request has been marked as an "Expensable" contribution.

We've sent you an email with further instructions on how to claim your expenses from our development fund.
⚠️ You seemed to have committed using an email address ending up with @users.noreply.github.com, if you don't receive the email please feel free to reach out to us at [email protected] or in the contributing channel on Discord.

We are looking forward to more contributions from you in the future 🙌

Have a nice day,
The WebdriverIO Team 🤖