Fix H2C start G-code record-data comments (#16406)

This fixes the H2C start G-code template by commenting the two
`========== record data ==========` separator lines.

Those lines are currently emitted as raw text inside
`machine_start_gcode`. Since they are not comments or G-code commands,
they can make the generated start sequence invalid or firmware-dependent
when the template is used. The fix preserves the separators as comments.

Fixes #16218.

Validation:
- Parsed the modified JSON profile with Python `json.loads`.
- Checked both `record data` separator lines now start with `;` after
unescaping the G-code string.

resources/profiles/BBL.json

@@ -1,7 +1,7 @@
 {
 	"name": "Bambulab",
 	"url": "http://www.bambulab.com/Parameters/vendor/BBL.json",
-	"version": "02.08.00.14",
+	"version": "02.08.00.15",
 	"force_update": "0",
 	"description": "the initial version of BBL configurations",
 	"machine_model_list": [