[2.2.x] Updated SpatiaLite install instructions to suggest first pack…

…age from recent Debian-based distributions.

Backport of 8180ffb from master

docs/ref/contrib/gis/install/spatialite.txt

@@ -7,9 +7,9 @@ spatial database.
 
 First, check if you can install SpatiaLite from system packages or binaries.
 
-For example, on Debian-based distributions, try to install the
-``spatialite-bin`` package. For distributions that package SpatiaLite 4.2+,
-install ``libsqlite3-mod-spatialite``.
+For example, on Debian-based distributions that package SpatiaLite 4.2+, try to
+install the ``libsqlite3-mod-spatialite`` package. For older releases install
+``spatialite-bin``.
 
 For macOS, follow the :ref:`instructions below<spatialite_macos>`.