CI: github: update to macos-26

macOS-15 images seems to have difficulties to run the reg-tests since a
few days for an unknown reason. Doing a rollback of both VTest2 and
haporxy doesn't seem to fix the problem so this is probably related to a
change in github actions.

This patch switches the image to the new macos-26 images which seems to
fix the problem.

diff --git a/.github/matrix.py b/.github/matrix.py
index e713afc378045482899885059ea483e15c749c91..9c9b966f696a3939c4b507ab74e8b7b187985f65 100755 (executable)
--- a/.github/matrix.py
+++ b/.github/matrix.py
@@ -280,7 +280,7 @@ def main(ref_name):
     if "haproxy-" in ref_name:
         os = "macos-13"     # stable branch
     else:
-        os = "macos-15"     # development branch
+        os = "macos-26"     # development branch
 
     TARGET = "osx"
     for CC in ["clang"]: