Adjust if statement syntax

Author: djdefi

.github/workflows/backup.yml

@@ -98,7 +98,7 @@ jobs:
         sudo tar -czvf "${{ inputs.backup-name }}.tar.gz" -C "$HOME/ghe-backup-data/$current" .
 
     - name: Login to Azure
-      if: inputs.backup-name != ""
+      if: "${{ inputs.backup-name != '' }}"
       run: |
         az login \
           --service-principal \
@@ -108,7 +108,7 @@ jobs:
         az account set --subscription "${{ secrets.AZURE_SUBSCRIPTION_ID }}"
 
     - name: Upload backup to Azure
-      if: inputs.backup-name != ""
+      if: "${{ inputs.backup-name != '' }}"
       run: |
         az storage blob upload \
         --account-name "${{ secrets.AZURE_ACCOUNT_NAME }}" \