patch 8.1.1370: not using the new github feature for donations

Problem:    Not using the new github feature for donations.
Solution:   Add a Sponsor button. (closes #4417)
diff --git a/.github/FUNDING.yml b/.github/FUNDING.yml
new file mode 100644
index 0000000..1d7ad39
--- /dev/null
+++ b/.github/FUNDING.yml
@@ -0,0 +1 @@
+custom: https://www.vim.org/sponsor/index.php
diff --git a/src/version.c b/src/version.c
index 224fde2..d2e4b90 100644
--- a/src/version.c
+++ b/src/version.c
@@ -768,6 +768,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1370,
+/**/
     1369,
 /**/
     1368,