runtime(doc): document further keys that scroll page up/down

fixes: #15107

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/scroll.txt b/runtime/doc/scroll.txt
index cf79353..b88e27b 100644
--- a/runtime/doc/scroll.txt
+++ b/runtime/doc/scroll.txt
@@ -1,4 +1,4 @@
-*scroll.txt*    For Vim version 9.1.  Last change: 2022 Oct 17
+*scroll.txt*    For Vim version 9.1.  Last change: 2024 Jul 05
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -48,6 +48,8 @@
 
 <S-Down>	or				*<S-Down>* *<kPageDown>*
 <PageDown>	or				*<PageDown>* *CTRL-F*
+<S-CR>	or				*<S-CR>* *CTRL-SHIFT-CR* *<S-NL>*
+<S-+>	or					*SHIFT-+* *<S-Plus>*
 CTRL-F			Scroll window [count] pages Forwards (downwards) in
 			the buffer.  See also 'startofline' option.
 			When there is only one window the 'window' option
@@ -85,6 +87,7 @@
 
 <S-Up>		or					*<S-Up>* *<kPageUp>*
 <PageUp>	or					*<PageUp>* *CTRL-B*
+<S-->		or				*<S-Minus>* *SHIFT-MINUS*
 CTRL-B			Scroll window [count] pages Backwards (upwards) in the
 			buffer.  See also 'startofline' option.
 			When there is only one window the 'window' option
diff --git a/runtime/doc/tags b/runtime/doc/tags
index d2c1523..f0df3eb 100644
--- a/runtime/doc/tags
+++ b/runtime/doc/tags
@@ -3742,6 +3742,7 @@
 <RightMouse>	visual.txt	/*<RightMouse>*
 <RightRelease>	term.txt	/*<RightRelease>*
 <S-	intro.txt	/*<S-*
+<S-CR>	scroll.txt	/*<S-CR>*
 <S-Del>	os_dos.txt	/*<S-Del>*
 <S-Down>	scroll.txt	/*<S-Down>*
 <S-End>	term.txt	/*<S-End>*
@@ -3761,6 +3762,9 @@
 <S-Insert>	os_dos.txt	/*<S-Insert>*
 <S-Left>	motion.txt	/*<S-Left>*
 <S-LeftMouse>	term.txt	/*<S-LeftMouse>*
+<S-Minus>	scroll.txt	/*<S-Minus>*
+<S-NL>	scroll.txt	/*<S-NL>*
+<S-Plus>	scroll.txt	/*<S-Plus>*
 <S-Right>	motion.txt	/*<S-Right>*
 <S-RightMouse>	term.txt	/*<S-RightMouse>*
 <S-ScrollWheelDown>	scroll.txt	/*<S-ScrollWheelDown>*
@@ -3942,6 +3946,7 @@
 CTRL-P	motion.txt	/*CTRL-P*
 CTRL-Q	gui_w32.txt	/*CTRL-Q*
 CTRL-R	undo.txt	/*CTRL-R*
+CTRL-SHIFT-CR	scroll.txt	/*CTRL-SHIFT-CR*
 CTRL-T	tagsrch.txt	/*CTRL-T*
 CTRL-U	scroll.txt	/*CTRL-U*
 CTRL-U-changed	version6.txt	/*CTRL-U-changed*
@@ -5690,6 +5695,8 @@
 Russian	russian.txt	/*Russian*
 S	change.txt	/*S*
 SHELL	starting.txt	/*SHELL*
+SHIFT-+	scroll.txt	/*SHIFT-+*
+SHIFT-MINUS	scroll.txt	/*SHIFT-MINUS*
 SQLGetType	ft_sql.txt	/*SQLGetType*
 SQLSetType	ft_sql.txt	/*SQLSetType*
 SafeState	autocmd.txt	/*SafeState*