patch 9.0.1348: Un-grammar files are not recognized

Problem:    Un-grammar files are not recognized.
Solution:   Add patterns for Un-grammar files. (Amaan Qureshi, closes #12034)

src/testdir/test_filetype.vim

@@ -608,6 +608,7 @@ let s:filename_checks = {
     \ 'typescript': ['file.mts', 'file.cts'],
     \ 'typescript.glimmer': ['file.gts'],
     \ 'typescriptreact': ['file.tsx'],
+    \ 'ungrammar': ['file.ungram'],
     \ 'uc': ['file.uc'],
     \ 'udevconf': ['/etc/udev/udev.conf', 'any/etc/udev/udev.conf'],
     \ 'udevperm': ['/etc/udev/permissions.d/file.permissions', 'any/etc/udev/permissions.d/file.permissions'],

src/version.c

@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1348,
 /**/
     1347,
 /**/