patch 8.2.2507: github build may fail if Ubuntu 20.04 is used
Problem: Github build may fail if Ubuntu 20.04 is used. Installing rust is
not needed.
Solution: Specify ubuntu-18.04 instead of latest. Update "pip" instead of
installing rust. (Ozaki Kiichi, closes #7820)
diff --git a/src/version.c b/src/version.c
index 6d01fa8..eeddd86 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
static int included_patches[] =
{ /* Add new patch number below this line */
/**/
+ 2507,
+/**/
2506,
/**/
2505,