patch 9.1.0326: filetype: some requirements files are not recognized

Problem:  filetype: some requirements files are not recognized
Solution: Detect '*-requirements.txt', 'constraints.txt',
          'requirements.in', 'requirements/*.txt' and 'requires/*.txt'
          as requirements filetype, include pip compiler, include
          requirements filetype and syntax plugin
          (Wu, Zhenyu, @raimon49)

closes: #14379

Co-authored-by: raimon <raimon49@hotmail.com>
Signed-off-by: Wu, Zhenyu <wuzhenyu@ustc.edu>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index 5addc13..d1912b2 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    326,
+/**/
     325,
 /**/
     324,