CI: add clang dep to fix error and git to docs CI

Author: nondetalle

.github/workflows/deploy-doc.yml

@@ -23,7 +23,7 @@ jobs:
         uses: ./.github/actions/install-doc
       - name: "Install additional dependencies for Doxygen"
         run: |
-          pacman -Syu --noconfirm base-devel ninja cmake ccache
+          pacman -Syu --noconfirm base-devel ninja cmake ccache clang git
           pacman --noconfirm -U https://archive.archlinux.org/packages/d/doxygen/doxygen-1.15.0-2-x86_64.pkg.tar.zst
       - name: "Build ns-3"
         env:

.github/workflows/test-doc.yml

@@ -22,7 +22,7 @@ jobs:
         uses: ./.github/actions/install-doc
       - name: "Install additional dependencies for Doxygen"
         run: |
-          pacman -Syu --noconfirm base-devel ninja cmake ccache
+          pacman -Syu --noconfirm base-devel ninja cmake ccache clang git
           pacman --noconfirm -U https://archive.archlinux.org/packages/d/doxygen/doxygen-1.15.0-2-x86_64.pkg.tar.zst
       - name: "Build ns-3"
         env: