docs: Update document headers

    - Remove the outdated :Status: field, being confusing.
    - Change :Authors: to :Author: where appropriate

Signed-off-by: Anton Komlev <anton.komlev@arm.com>
Change-Id: I7aa33778ac4794a8360abaafdc0e98519478c6f0
diff --git a/docs/technical_references/design_docs/code_sharing.rst b/docs/technical_references/design_docs/code_sharing.rst
index 322d7ed..2312861 100644
--- a/docs/technical_references/design_docs/code_sharing.rst
+++ b/docs/technical_references/design_docs/code_sharing.rst
@@ -2,7 +2,7 @@
 Code sharing between independently linked XIP binaries
 ######################################################
 
-:Authors: Tamas Ban
+:Author: Tamas Ban
 :Organization: Arm Limited
 :Contact: tamas.ban@arm.com