GStreamer 1.26.6 Adds Support for WVC1 and WMV3 Codecs to Video4Linux2

GStreamer 1.26.6 introduces support for WVC1 and WMV3 codecs to V4L2 (Video for Linux API version 2), adds a new blocking adapter element to the threadshare plugin (gst-plugin-threadshare) for use in front of block elements like sinks that sync to the clock, and updates the librespot library to version 0.7 for compatibility with recent Spotify changes.