fix windows depot path expansion (#146)

action.yml

@@ -66,7 +66,11 @@ runs:
         else
             depot="~/.julia"
         fi
-        depot="${depot/#\~/$HOME}"  # Expand tilde which cannot be used in BASH checks (i.e. `[ -d "~/.julia" ]` fails)
+        if [[ "$OSTYPE" == "msys" || "$OSTYPE" == "cygwin" ]]; then
+          depot="${depot/#\~/$USERPROFILE}"  # Windows paths
+        else
+          depot="${depot/#\~/$HOME}"  # Unix-like paths
+        fi
         echo "depot=$depot" | tee -a "$GITHUB_OUTPUT"
 
         cache_paths=()
@@ -140,6 +144,7 @@ runs:
     # Pkg operations. So this is only necessary for newer julia versions.
     - name: Update any cached registries
       if: ${{ inputs.cache-registries == 'true' }}
+      continue-on-error: true
       run: |
         if [ -d "${{ steps.paths.outputs.depot }}/registries" ] && [ -n "$(ls -A "${{ steps.paths.outputs.depot }}/registries")" ]; then
           echo "Registries directory exists and is non-empty. Updating any registries"