logo-text.svg: Replace with a version that renders successfully in RSVG
For whatever reason, rsvg-convert rendered the previous version of this SVG as blank (see also #1086987). Copying the logo from logo-text-version.svg as of 13.0.1 (which does not include the version number, contrary to its name) results in a logo that works as intended.
Closes: #1104043
Previously part of !8 (closed), in which it used a modification of the logo from the Emerald theme rather than the version that has now been recoloured for use with the Ceratopsian theme.