build: link with lld by default on Linux; add Xcode 14.1 to CI matrix

Change-Id: Ia601e1e7e3706842ead7a06249ca45e276074972
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 19276c1..f2c90c8 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -15,7 +15,7 @@
     strategy:
       fail-fast: false
       matrix:
-        os: [macos-12, ubuntu-20.04]
+        os: [macos-latest, ubuntu-latest]
     env:
       JOB_NAME: Docs
     steps:
@@ -27,6 +27,8 @@
           ./.jenkins
       - name: Build documentation
         run: |
+          pybindir=$(python3 -c 'import sysconfig; print(sysconfig.get_path("scripts", "posix_user"))')
+          export PATH="${pybindir}${PATH:+:}${PATH}"
           ./waf --color=yes configure
           ./waf --color=yes build --targets=version.hpp
           ./waf --color=yes docs