runtime(java): Optionally recognise _module_ import declarations

Define "g:java_syntax_previews" and include number 476 in
its list to enable this recognition:
------------------------------------------------------------
        let g:java_syntax_previews = [476]
------------------------------------------------------------

Reference:
https://openjdk.org/jeps/476

closes: #15709

Signed-off-by: Aliaksei Budavei <0x000c70@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/syntax.txt b/runtime/doc/syntax.txt
index 01aa92a..4a5b07c 100644
--- a/runtime/doc/syntax.txt
+++ b/runtime/doc/syntax.txt
@@ -1,4 +1,4 @@
-*syntax.txt*	For Vim version 9.1.  Last change: 2024 Sep 18
+*syntax.txt*	For Vim version 9.1.  Last change: 2024 Sep 19
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -2176,11 +2176,12 @@
 withdrawn from this effort.  To cater for early adopters, there is optional
 support in Vim for syntax related preview features that are implemented.  You
 can request it by specifying a list of preview feature numbers as follows: >
-	:let g:java_syntax_previews = [455]
+	:let g:java_syntax_previews = [455, 476]
 
 The supported JEP numbers are to be drawn from this table:
 	`430`: String Templates [JDK 21]
 	`455`: Primitive types in Patterns, instanceof, and switch
+	`476`: Module Import Declarations
 
 Note that as soon as the particular preview feature will have been integrated
 into the Java platform, its entry will be removed from the table and related