HDDS-14736. Escape {...} in xml_to_md.py, rename appendix.md (#9846)

Author: sarvekshayr

.github/workflows/update-ozone-site-config-doc.yml

@@ -73,7 +73,7 @@ jobs:
             exit 0
           fi
           
-          TARGET_FILE="$TARGET_DIR/05-appendix.md"
+          TARGET_FILE="$TARGET_DIR/99-appendix.md"
           echo "Checking against $TARGET_FILE"
           
           # Copy new file to target location

dev-support/ci/xml_to_md.py

@@ -106,10 +106,14 @@ def generate_markdown(properties):
 |:-----|:--------------|:-----|:------------|
 """
 
+  placeholder_pattern = re.compile(r'(\$)?\{([^}]+)\}')
+
   for prop in sorted(properties.values(), key=lambda p: p.name):
-    # Escape pipe characters in description to prevent breaking the table
+    # Escape pipe characters and wrap {placeholders} in backticks
     description = prop.description.replace('|', '\\|')
-    value = prop.value if prop.value else ''
+    description = placeholder_pattern.sub(r'`\1{\2}`', description)
+    value = prop.value.replace('|', '\\|') if prop.value else ''
+    value = placeholder_pattern.sub(r'`\1{\2}`', value) if value else ''
 
     markdown += f"| `{prop.name}` | {value} | {prop.tag} | {description} |\n"