patch 9.1.1033: tests: shaderslang was removed from test_filetype erroneously

Problem:  tests: shaderslang was removed from test_filetype erroneously
          (Christian Clason, after v9.1.1030)
Solution: restore the test

Signed-off-by: Christian Brabandt <cb@256bit.org>

src/testdir/test_filetype.vim

@@ -691,6 +691,7 @@ def s:GetFilenameChecks(): dict<list<string>>
          '/etc/udev/cdsymlinks.conf', 'any/etc/udev/cdsymlinks.conf', 'file.bats', '.ash_history', 'any/etc/neofetch/config.conf', '.xprofile',
          'user-dirs.defaults', 'user-dirs.dirs', 'makepkg.conf', '.makepkg.conf', 'file.mdd', 'file.cygport', '.env', '.envrc', 'devscripts.conf',
          '.devscripts', 'file.lo', 'file.la', 'file.lai'],
+    shaderslang: ['file.slang'],
     sieve: ['file.siv', 'file.sieve'],
     sil: ['file.sil'],
     simula: ['file.sim'],

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1033,
 /**/
     1032,
 /**/