[ULS] Remove unnecessary blank line in changelog

Before we had this:

-- arm64: add kernel config option to lock down when in Secure Bo...
-- github actions: Make Builds on Merge Request Work (Jonathan Maple)
-- Add CIQ configs (Jonathan Maple)

-- Linux 6.12.77 (https://cdn.kernel.org/pub/linux/kernel/v6.x/Ch...

Now we have this:

-- arm64: add kernel config option to lock down when in Secure Bo...
-- github actions: Make Builds on Merge Request Work (Jonathan Maple)
-- Add CIQ configs (Jonathan Maple)
-- Linux 6.12.77 (https://cdn.kernel.org/pub/linux/kernel/v6.x/Ch...

Author: bmastbergen

update_lt_spec.py

@@ -111,7 +111,6 @@ def update_spec_file(
         sys.exit(1)
 
     changelog_lines += [
-        "",
         f"-- Linux {full_kernel_version} (https://cdn.kernel.org/pub/linux/kernel/v{lt_major_version}.x/ChangeLog-{full_kernel_version})",
         "",
         "",