[DOCS] Fix table cols value order for Asciidoctor

Author: jrodewig

docs/reference/upgrade.asciidoc

@@ -37,7 +37,7 @@ need to reindex or delete old indices, and when a full cluster restart is
 required.
 
 [[upgrade-paths]]
-[cols="1<m,1<m,3",options="header",]
+[cols="<1m,<1m,3",options="header",]
 |=======================================================================
 |Upgrade From   |Upgrade To     |Supported Upgrade Type
 |5.x            |5.y            |<<rolling-upgrades,Rolling upgrade>> (where `y > x`)