YT-262: Hide bootloader artifacts on the Release page

  Customers often misinterpret the presence of bootloader artifacts
  on the Release page as a sanctioned method for updating the bootloader.
  Currently, these artifacts are intended for internal use only.

confluence-page.xml.jinja2

@@ -169,7 +169,8 @@
                 {%- set files = [] -%}
                 {%- for file in FILES_machine -%}
                 {%- if "uimage" in file.lower() or "boot" in file.lower() -%}
-                {%- set _ = files.append(file) -%}
+                {#- Currently do not display bootloader artifacts; they are intended for internal use only. -#}
+                {#- {%- set _ = files.append(file) -%} -#}
                 {%- set _ = used_files.append(file) -%}
                 {%- endif -%}
                 {%- endfor -%}