patch 9.0.2053: zig filetype detection test wrong

Problem:  zig filetype detection test wrong
Solution: Remove .zir pattern, add new test for .zon pattern

closes: #13389

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: Gregory Anders <greg@gpanders.com>

src/testdir/test_filetype.vim

@@ -813,10 +813,9 @@ def s:GetFilenameChecks(): dict<list<string>>
     yang: ['file.yang'],
     yuck: ['file.yuck'],
     z8a: ['file.z8a'],
-    zig: ['file.zig'],
+    zig: ['file.zig', 'build.zig.zon'],
     zimbu: ['file.zu'],
     zimbutempl: ['file.zut'],
-    zir: ['file.zir'],
     zserio: ['file.zs'],
     zsh: ['.zprofile', '/etc/zprofile', '.zfbfmarks', 'file.zsh',
           '.zcompdump', '.zlogin', '.zlogout', '.zshenv', '.zshrc',

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2053,
 /**/
     2052,
 /**/