texinfo: sync with upstream: update release date

src/doc/screen.texinfo

@@ -53,7 +53,7 @@ by the Foundation.
 @title Screen
 @subtitle The virtual terminal manager
 @subtitle for Version @value{version}
-@subtitle Jul 2024
+@subtitle Aug 2024
 
 @page
 @vskip 0pt plus 1filll
@@ -5664,14 +5664,13 @@ white
 
 You can also use the pseudo-color 'i' to set just the brightness
 and leave the color unchanged.
-
 As a special case, @samp{%@{-@}} restores the attributes and colors that
 were set before the last change was made (i.e. pops one level of the
 color-change stack).
 
 Examples:
 @table @samp
-@item 12
+@item i2
 set color to bright green
 @item +b r
 use bold red