fix: install rust (of course)

.gitea/workflows/nightly.yml

@@ -30,7 +30,7 @@ jobs:
           sudo apt-get update -qq
           sudo apt-get install -y --no-install-recommends \
             cmake ninja-build rsync zip \
-            clang lld llvm
+            clang lld llvm cargo rustc
 
       - name: Install xwin
         run: |