contrib/contacts: rename .txt to .adoc

The .txt extensions were changed to .adoc in 1f010d6bdf (doc: use .adoc
extension for AsciiDoc files, 2025-01-20).

Do the same for contrib/contacts.

Signed-off-by: Todd Zullinger <tmz@pobox.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

contrib/contacts/Makefile

@@ -34,7 +34,7 @@ GIT_CONTACTS := git-contacts
 
 GIT_CONTACTS_DOC := git-contacts.1
 GIT_CONTACTS_XML := git-contacts.xml
-GIT_CONTACTS_TXT := git-contacts.txt
+GIT_CONTACTS_TXT := git-contacts.adoc
 GIT_CONTACTS_HTML := git-contacts.html
 
 doc: $(GIT_CONTACTS_DOC) $(GIT_CONTACTS_HTML)

contrib/contacts/meson.build

@@ -16,7 +16,7 @@ if get_option('docs').contains('man')
       '@INPUT@',
     ],
     depends: documentation_deps,
-    input: 'git-contacts.txt',
+    input: 'git-contacts.adoc',
     output: 'git-contacts.xml',
   )
 
@@ -47,7 +47,7 @@ if get_option('docs').contains('html')
       '@INPUT@',
     ],
     depends: documentation_deps,
-    input: 'git-contacts.txt',
+    input: 'git-contacts.adoc',
     output: 'git-contacts.html',
     install: true,
     install_dir: get_option('datadir') / 'doc/git-doc',