CI: fix khronos-egl docs link

Author: bilelmoussaoui

.github/workflows/docs.yml

@@ -40,7 +40,7 @@ jobs:
           RUSTDOCFLAGS: >
             --extern-html-root-url=wayland_client=https://smithay.github.io/wayland-rs/
             --extern-html-root-url=x11=https://docs.rs/x11/latest/
-            --extern-html-root-url=khronos-egl=https://docs.rs/khronos-egl/latest/
+            --extern-html-root-url=khronos_egl=https://docs.rs/khronos-egl/latest/
             --extern-html-root-url=xkb=https://docs.rs/xkb/latest/
       - uses: actions-rs/cargo@v1
         with: