patch 8.2.0161: not recognizing .gv file as dot filetype

Problem:    Not recognizing .gv file as dot filetype.
Solution:   Add *.gv to dot pattern. (closes #5544)
diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index 0916f5c..2bd8534 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -139,7 +139,7 @@
     \ 'dockerfile': ['Containerfile', 'Dockerfile', 'file.Dockerfile'],
     \ 'dosbatch': ['file.bat', 'file.sys'],
     \ 'dosini': ['.editorconfig', '/etc/yum.conf', 'file.ini'],
-    \ 'dot': ['file.dot'],
+    \ 'dot': ['file.dot', 'file.gv'],
     \ 'dracula': ['file.drac', 'file.drc', 'filelvs', 'filelpe'],
     \ 'dsl': ['file.dsl'],
     \ 'dtd': ['file.dtd'],
diff --git a/src/version.c b/src/version.c
index 562b5fb..a87ca07 100644
--- a/src/version.c
+++ b/src/version.c
@@ -743,6 +743,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    161,
+/**/
     160,
 /**/
     159,