patch 9.1.0987: filetype: cake files are not recognized

Problem:  filetype: cake files are not recognized
Solution: detect '*.cake' files as cs filetype
          (Zoe Roux)

References:
https://cakebuild.net/

closes: #16367

Signed-off-by: Zoe Roux <zoe.roux@zoriya.dev>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/filetype.vim b/runtime/filetype.vim
index 4d7205f..ac77cbb 100644
--- a/runtime/filetype.vim
+++ b/runtime/filetype.vim
@@ -342,7 +342,7 @@
 au BufNewFile,BufRead cgdbrc			setf cgdbrc
 
 " C#
-au BufNewFile,BufRead *.cs,*.csx		setf cs
+au BufNewFile,BufRead *.cs,*.csx,*.cake		setf cs
 
 " CSDL
 au BufNewFile,BufRead *.csdl			setf csdl
diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index 59a9161..54f0385 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -196,7 +196,7 @@
     crm: ['file.crm'],
     crontab: ['crontab', 'crontab.file', '/etc/cron.d/file', 'any/etc/cron.d/file'],
     crystal: ['file.cr'],
-    cs: ['file.cs', 'file.csx'],
+    cs: ['file.cs', 'file.csx', 'file.cake'],
     csc: ['file.csc'],
     csdl: ['file.csdl'],
     csp: ['file.csp', 'file.fdr'],
diff --git a/src/version.c b/src/version.c
index 97c1488..1dbbca5 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    987,
+/**/
     986,
 /**/
     985,