ci: adopt reusable workflows from `named-data/actions`

Change-Id: Iefd142d82f56a6fb83c5039565b6eba83c6e6445
diff --git a/docs/doxygen.conf.in b/docs/doxygen.conf.in
index edc9da7..702cd08 100644
--- a/docs/doxygen.conf.in
+++ b/docs/doxygen.conf.in
@@ -68,7 +68,7 @@
 # performance problems for the file system.
 # The default value is: NO.
 
-CREATE_SUBDIRS         = YES
+CREATE_SUBDIRS         = NO
 
 # If the ALLOW_UNICODE_NAMES tag is set to YES, doxygen will allow non-ASCII
 # characters to appear in the names of generated files. If set to NO, non-ASCII
@@ -1178,7 +1178,7 @@
 # The default value is: NO.
 # This tag requires that the tag GENERATE_HTML is set to YES.
 
-HTML_TIMESTAMP         = YES
+HTML_TIMESTAMP         = NO
 
 # If the HTML_DYNAMIC_SECTIONS tag is set to YES then the generated HTML
 # documentation will contain sections that can be hidden and shown after the