docs: design: fix up some document titles
authorTim-Philipp Müller <tim@centricular.com>
Mon, 18 Apr 2022 19:05:54 +0000 (20:05 +0100)
committerGStreamer Marge Bot <gitlab-merge-bot@gstreamer-foundation.org>
Mon, 18 Apr 2022 21:39:32 +0000 (21:39 +0000)
commit819d436ec43996d4987b51175d81f42d5d00ae0a
tree542f34eb641381b3aacf1b212b370a8e7d098869
parentd726a839e4b6fd26698381ab2db2aecef38eb7ef
docs: design: fix up some document titles

These show up in the index.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2222>
subprojects/gst-docs/markdown/additional/design/MT-refcounting.md
subprojects/gst-docs/markdown/additional/design/framestep.md
subprojects/gst-docs/markdown/additional/design/sparsestreams.md