patch 9.1.0390: filetype: inko files are not recognized

Problem:  filetype: inko files are not recognized
Solution: Detect '*.inko' as ink filetype
          (Yorick Peterse)

See:
- https://github.com/inko-lang/inko.vim
- https://inko-lang.org/

closes: #14699

Signed-off-by: Yorick Peterse <git@yorickpeterse.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

runtime/filetype.vim

@@ -1103,6 +1103,9 @@ au BufNewFile,BufRead *.ini,*.INI		setf dosini
 " SysV Inittab
 au BufNewFile,BufRead inittab			setf inittab
 
+" Inko
+au BufNewFile,BufRead *.inko			setf inko
+
 " Inno Setup
 au BufNewFile,BufRead *.iss			setf iss
 

src/testdir/test_filetype.vim

@@ -344,6 +344,7 @@ def s:GetFilenameChecks(): dict<list<string>>
     inform: ['file.inf', 'file.INF'],
     initng: ['/etc/initng/any/file.i', 'file.ii', 'any/etc/initng/any/file.i'],
     inittab: ['inittab'],
+    inko: ['file.inko'],
     ipfilter: ['ipf.conf', 'ipf6.conf', 'ipf.rules'],
     iss: ['file.iss'],
     ist: ['file.ist', 'file.mst'],

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    390,
 /**/
     389,
 /**/