remove the whole artifact and re-add via libiconv_jll

Author: jkrumbiegel

.github/workflows/test-smokes.yml

@@ -191,11 +191,11 @@ jobs:
       - name: delete libcharset-1.dll to fix cache
         if: runner.os == 'Windows'
         run: |
-          rm -f "C:/Users/runneradmin/.julia/artifacts/1da3b3a2698813adf2b925c46aa2d68ec8474449/bin/libcharset-1.dll"
+          rm -rf "C:/Users/runneradmin/.julia/artifacts/1da3b3a2698813adf2b925c46aa2d68ec8474449/"
         shell: bash
 
       - name: Instantiate QuartoNotebookRunner
-        run: julia --project=$GITHUB_WORKSPACE/qnr -e 'using Pkg; Pkg.update()'
+        run: julia --project=$GITHUB_WORKSPACE/qnr -e 'using Pkg; Pkg.add("Libiconv_jll"); Pkg.update()'
         shell: bash
 
       - name: Restore Julia Packages