Update CHANGES.md

Bump version

Reduce gfx_display_rotate_z calls in menu drivers (libretro#12937)

* (Ozone) Take out gfx_display_rotate_z out of ozone_draw_icon -
lots of matrix rotates and multiplies were happening when
just calling it once would suffice

* (MaterialUI) Reduce calls to gfx_display_rotate_z

* (XMB) Cleanup

Update CHANGES.md

Bump version to 1.9.7

Update CHANGES.md

Bump up version to 1.9.5

Bump version to 1.9.4

Bump version to 1.9.3

Update CHANGES.md