multimedia/pipe-viewer: Update to 0.4.8

ChangeLog: https://github.com/trizen/pipe-viewer/releases/tag/0.4.8

• Recognize two new itags: 700 and 701.
• Remove $ from the filename, when followed by a letter.
• Fixed the "CONSENT" cookie

PR: 272866
Reported by: DtxdF@disroot.org (maintainer)