Merge upstream Horizon-OC 2.6.0 changelog.

CHANGELOG.md

@@ -0,0 +1,10 @@
+# Horizon OC 2.6.0
+ - loader:
+   - Update for Atmosphere 1.12.1
+   - Add 2805MHz CPU and 1235mV VMAX (use with caution!)
+   - Make JEDEC step mode default
+ - hoc-clk:
+   - Fix bugs in GM20B driver
+  - hocate:
+   - update to 6.5.4
+**Full Changelog**: https://github.com/Horizon-OC/Horizon-OC/compare/3.0.0-test1...2.6.0-rel