Fix YAML syntax error in workflow file

Replace JavaScript template literals with string concatenation to avoid
YAML parser confusion with template literal interpolation syntax.
GitHub Actions YAML parser can misinterpret template literal dollar-brace
syntax as expression delimiters.

Author: sensei-hacker

.github/workflows/pg-version-check.yml

@@ -49,7 +49,7 @@ jobs:
         with:
           script: |
             // Use the captured output from the previous step
-            const output = `${{ steps.pg_check.outputs.output }}`;
+            const output = '${{ steps.pg_check.outputs.output }}';
             let issuesContent = '';
 
             try {
@@ -73,29 +73,23 @@ jobs:
               issuesContent = '*Unable to extract detailed issues*';
             }
 
-            const commentBody = `## ⚠️ Parameter Group Version Check
-
-The following parameter groups may need version increments:
-
-${issuesContent}
-
-**Why this matters:**
-Modifying PG struct fields without incrementing the version can cause settings corruption when users flash new firmware. The \`pgLoad()\` function validates versions and will use defaults if there's a mismatch, preventing corruption.
-
-**When to increment the version:**
-- ✅ Adding/removing fields
-- ✅ Changing field types or sizes
-- ✅ Reordering fields
-- ✅ Adding/removing packing attributes
-- ❌ Only changing default values in \`PG_RESET_TEMPLATE\`
-- ❌ Only changing comments
-
-**Reference:**
-- [Parameter Group Documentation](../docs/development/parameter_groups/)
-- Example: [PR #11236](https://github.com/iNavFlight/inav/pull/11236) (field removal requiring version increment)
-
----
-*This is an automated check. False positives are possible. If you believe the version increment is not needed, please explain in a comment.*`;
+            const commentBody = '## ⚠️ Parameter Group Version Check\n\n' +
+              'The following parameter groups may need version increments:\n\n' +
+              issuesContent + '\n\n' +
+              '**Why this matters:**\n' +
+              'Modifying PG struct fields without incrementing the version can cause settings corruption when users flash new firmware. The `pgLoad()` function validates versions and will use defaults if there\'s a mismatch, preventing corruption.\n\n' +
+              '**When to increment the version:**\n' +
+              '- ✅ Adding/removing fields\n' +
+              '- ✅ Changing field types or sizes\n' +
+              '- ✅ Reordering fields\n' +
+              '- ✅ Adding/removing packing attributes\n' +
+              '- ❌ Only changing default values in `PG_RESET_TEMPLATE`\n' +
+              '- ❌ Only changing comments\n\n' +
+              '**Reference:**\n' +
+              '- [Parameter Group Documentation](../docs/development/parameter_groups/)\n' +
+              '- Example: [PR #11236](https://github.com/iNavFlight/inav/pull/11236) (field removal requiring version increment)\n\n' +
+              '---\n' +
+              '*This is an automated check. False positives are possible. If you believe the version increment is not needed, please explain in a comment.*';
 
             try {
               // Check if we already commented