patch 8.2.2773: PSL filetype not recognized

Problem:    PSL filetype not recognized.
Solution:   Add a filetype pattern. (Daniel Kho, closes #8117)
diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index f8e8b5d..4035cc4 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -392,6 +392,7 @@
     \ 'ps1': ['file.ps1', 'file.psd1', 'file.psm1', 'file.pssc'],
     \ 'ps1xml': ['file.ps1xml'],
     \ 'psf': ['file.psf'],
+    \ 'psl': ['file.psl'],
     \ 'puppet': ['file.pp'],
     \ 'pyrex': ['file.pyx', 'file.pxd'],
     \ 'python': ['file.py', 'file.pyw', '.pythonstartup', '.pythonrc', 'file.ptl', 'file.pyi', 'SConstruct'],
diff --git a/src/version.c b/src/version.c
index 4bc8423..113ba8f 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2773,
+/**/
     2772,
 /**/
     2771,