Rename to GNOME LaTeX: "previously named LaTeXila" in app description

At some point I'll remove it, for example in 2021.

data/org.gnome.gnome-latex.appdata.xml.in

@@ -8,9 +8,10 @@
   <_summary>LaTeX editor</_summary>
   <description>
     <_p>
-      GNOME LaTeX is a LaTeX editor for the GNOME desktop. GNOME LaTeX permits
-      to concentrate on the content and the structure of the document instead
-      of being distracted by its presentation.
+      GNOME LaTeX is a LaTeX editor for the GNOME desktop, previously named
+      LaTeXila. GNOME LaTeX permits to concentrate on the content and the
+      structure of the document instead of being distracted by its
+      presentation.
     </_p>
     <_p>
       To help the writing of the LaTeX markup, auto-completion is available as

latexila.doap

@@ -8,9 +8,10 @@
   <name xml:lang="en">latexila</name>
   <shortdesc xml:lang="en">GNOME LaTeX, a LaTeX editor</shortdesc>
   <description xml:lang="en">
-GNOME LaTeX is a LaTeX editor for the GNOME desktop. GNOME LaTeX permits
-to concentrate on the content and the structure of the document instead
-of being distracted by its presentation.
+GNOME LaTeX is a LaTeX editor for the GNOME desktop, previously named
+LaTeXila. GNOME LaTeX permits to concentrate on the content and the
+structure of the document instead of being distracted by its
+presentation.
 
 To help the writing of the LaTeX markup, auto-completion is available as
 well as menus and toolbars with the principal commands. New documents are