Fix vendor workflow Unicode escape error by converting echo to PowerShell here-strings

Co-authored-by: DRSDavidSoft <[email protected]>

Author: Copilot

.github/workflows/vendor.yml

@@ -31,10 +31,12 @@ jobs:
     - name: Summary - Workflow started
       shell: pwsh
       run: |
-        echo "## 📦 Update Vendor - Workflow Summary" >> $env:GITHUB_STEP_SUMMARY
-        echo "" >> $env:GITHUB_STEP_SUMMARY
-        echo "Checking for vendor dependency updates..." >> $env:GITHUB_STEP_SUMMARY
-        echo "" >> $env:GITHUB_STEP_SUMMARY
+        @"
+        ## 📦 Update Vendor - Workflow Summary
+        
+        Checking for vendor dependency updates...
+        
+        "@ | Add-Content -Path $env:GITHUB_STEP_SUMMARY -Encoding utf8
 
     - id: make-changes
       name: Checking for updates
@@ -64,17 +66,21 @@ jobs:
       run: |
         $count = $env:COUNT_UPDATED
         if ($count -eq 0) {
-          echo "### ✅ No Updates Available" >> $env:GITHUB_STEP_SUMMARY
-          echo "" >> $env:GITHUB_STEP_SUMMARY
-          echo "All vendor dependencies are up to date." >> $env:GITHUB_STEP_SUMMARY
+          @"
+          ### ✅ No Updates Available
+          
+          All vendor dependencies are up to date.
+          "@ | Add-Content -Path $env:GITHUB_STEP_SUMMARY -Encoding utf8
         } else {
           $word = if ($count -eq 1) { 'dependency' } else { 'dependencies' }
-          echo "### 🔄 Updates Found" >> $env:GITHUB_STEP_SUMMARY
-          echo "" >> $env:GITHUB_STEP_SUMMARY
-          echo "**$count** vendor $word updated:" >> $env:GITHUB_STEP_SUMMARY
-          echo "" >> $env:GITHUB_STEP_SUMMARY
-          echo "$env:UPDATE_MESSAGE" >> $env:GITHUB_STEP_SUMMARY
-          echo "" >> $env:GITHUB_STEP_SUMMARY
+          @"
+          ### 🔄 Updates Found
+          
+          **$count** vendor $word updated:
+          
+          $env:UPDATE_MESSAGE
+          
+          "@ | Add-Content -Path $env:GITHUB_STEP_SUMMARY -Encoding utf8
         }
 
     - uses: peter-evans/create-pull-request@v7
@@ -94,12 +100,14 @@ jobs:
       if: env.COUNT_UPDATED > 0
       shell: pwsh
       run: |
-        echo "### 🎉 Pull Request Created" >> $env:GITHUB_STEP_SUMMARY
-        echo "" >> $env:GITHUB_STEP_SUMMARY
-        echo "A pull request has been created to update the vendor dependencies." >> $env:GITHUB_STEP_SUMMARY
-        echo "" >> $env:GITHUB_STEP_SUMMARY
-        echo "**Branch:** \`update-vendor\`" >> $env:GITHUB_STEP_SUMMARY
-        echo "" >> $env:GITHUB_STEP_SUMMARY
-        echo "**Updated dependencies:** $env:LIST_UPDATED" >> $env:GITHUB_STEP_SUMMARY
-        echo "" >> $env:GITHUB_STEP_SUMMARY
-        echo "> Please review and merge the pull request to apply the updates." >> $env:GITHUB_STEP_SUMMARY
+        @"
+        ### 🎉 Pull Request Created
+        
+        A pull request has been created to update the vendor dependencies.
+        
+        **Branch:** ``update-vendor``
+        
+        **Updated dependencies:** $env:LIST_UPDATED
+        
+        > Please review and merge the pull request to apply the updates.
+        "@ | Add-Content -Path $env:GITHUB_STEP_SUMMARY -Encoding utf8