github: add new crates doc links

Signed-off-by: Marc-André Lureau <[email protected]>

Author: elmarco

.github/workflows/docs.yml

@@ -36,7 +36,11 @@ jobs:
       - run: echo "DEST=$(if [ "$GITHUB_EVENT_NAME" == "release" ]; then echo 'stable/${{ env.RELEASE }}'; else echo 'git'; fi)" >> ${GITHUB_ENV}
       - run: echo "RUSTDOCFLAGS=$(eval python3 ./gir-rustdoc/gir-rustdoc.py --pages-url 'https://gtk-rs.org/gtk4-rs/' --default-branch 'master' pre-docs | xargs)" >> ${GITHUB_ENV}
         env:
-          RUSTDOCFLAGS: --extern-html-root-url=wayland_client=https://smithay.github.io/wayland-rs/ --extern-html-root-url=x11=https://docs.rs/x11/latest/
+          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=xkb=https://docs.rs/xkb/latest/
       - uses: actions-rs/cargo@v1
         with:
           command: doc