Only run steps if there are vulnerabilities

I thought that `exit 0` in the "Exit if No Vulnerabilities Found" step
would completely exit the workflow, but it doesn't! We need to check for
vulnerabilities before each step.

action.yml

@@ -22,25 +22,27 @@ runs:
     - name: Exit if No Vulnerabilities Found
       if: ${{ steps.bundle_audit.outputs.has_vulnerabilities == 'false' }}
       run: |
-        echo "No vulnerabilities found. Exiting workflow."
-        exit 0
+        echo "No vulnerabilities found."
       shell: bash
 
     - name: Save Audit Output to File
+      if: ${{ steps.bundle_audit.outputs.has_vulnerabilities == 'true' }}
       run: |
         jq -r . <<EOF > audit_output.txt
         ${{ steps.bundle_audit.outputs.audit_output }}
         EOF
       shell: bash
 
     - name: Split Vulnerabilities
+      if: ${{ steps.bundle_audit.outputs.has_vulnerabilities == 'true' }}
       run: |
         cat audit_output.txt
         awk '/^Name:/,/^Solution:/' audit_output.txt | csplit -f vuln - '/^Name:/' '{*}' > /dev/null || true
         find . -name 'vuln*' -size 0 -delete
       shell: bash
 
     - name: Process Vulnerabilities and Create Asana Tasks
+      if: ${{ steps.bundle_audit.outputs.has_vulnerabilities == 'true' }}
       env:
         ASANA_TOKEN: ${{ inputs.asana_token }}
         ASANA_PROJECT_ID: ${{ inputs.asana_project_id }}