videoparsers: fix colorimetry update in h264/h265parse plugin src caps
requested to merge Harikrishnan/gstreamer:fix-colorimetry-update-in-h264/h265parse-src-caps into main
Eventhough colorimetry info is correctly parsed inside h264parser and h265parser plugins, it was not updated correctly in src caps for some specific color range, color primaries, color matrix combo. Updating src caps correctly now.
Fixes #3556