fix: render library v2 assets with whitespace

[DanielVZ96]

Description

Assets that contain whitespace fail to be rendered when uploaded to library v2.

Supporting information

• Context: fix: render library assets named xblock-... #35910 (comment)

Testing instructions

(Make sure you are running the latest frontend-app-authoring changes, and if it still doesn't work try running provisioning)

1. create a text xblock
2. upload any image that contains spaces in their name (eg."hi there.png")
3. assert that once you save, the image gets rendered correctly

Deadline

ASAP

Other information

Extracted from: #35910
Private-Ref

[openedx-webhooks]

Thanks for the pull request, @DanielVZ96!

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[ChrisChV]

Looks good. I will merge it on Monday 👍