[docs][llvm-objcopy] Fix unpaired <align>`

Author: MaskRay

llvm/docs/CommandGuide/llvm-objcopy.rst

@@ -127,7 +127,7 @@ multiple file formats.
 
 .. option:: --set-section-alignment <section>=<align>
 
- Set the alignment of section ``<section>`` to `<align>``. Can be specified
+ Set the alignment of section ``<section>`` to ``<align>``. Can be specified
  multiple times to update multiple sections.
 
 .. option:: --set-section-flags <section>=<flag>[,<flag>,...]