update workflow

Author: rauhul

.github/actions/install-swift/action.yml

@@ -60,13 +60,15 @@ runs:
       if: runner.os == 'macOS' && steps.cache-swift.outputs.cache-hit != 'true'
       shell: bash
       run: |
+        set -ex
+
         SWIFTLY_VERSION=1.0.1
         SWIFTLY_PKG=swiftly-$SWIFTLY_VERSION.pkg
         curl -O "https://download.swift.org/swiftly/darwin/$SWIFTLY_PKG"
         pkgutil --check-signature $SWIFTLY_PKG
         pkgutil --verbose --expand $SWIFTLY_PKG $SWIFTLY_HOME_DIR
         tar -C $SWIFTLY_HOME_DIR -xvf $SWIFTLY_HOME_DIR/swiftly-*/Payload
-        ./swiftly init \
+        "$SWIFTLY_BIN_DIR/swiftly" init \
           --skip-install \
           --assume-yes \
           --quiet-shell-followup \