[doc] annas_archive: ctegs journal_article & book_any has been removed

In commit 8af181533 in PR:

- https://github.com/searxng/searxng/pull/3321

the category `journal_article` has been removed, `book_any` has been removed
longer time ago.

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

searx/engines/annas_archive.py

@@ -25,7 +25,7 @@ for *newest* articles and journals (PDF) / by shortcut ``!aaa <search-term>``.
   - name: annas articles
     engine: annas_archive
     shortcut: aaa
-    aa_content: 'journal_article'
+    aa_content: 'magazine'
     aa_ext: 'pdf'
     aa_sort: 'newest'
 
@@ -61,7 +61,7 @@ base_url: str = "https://annas-archive.org"
 aa_content: str = ""
 """Anan's search form field **Content** / possible values::
 
-    journal_article, book_any, book_fiction, book_unknown, book_nonfiction,
+    book_fiction, book_unknown, book_nonfiction,
     book_comic, magazine, standards_document
 
 To not filter use an empty string (default).

searx/settings.yml

@@ -314,9 +314,9 @@ engines:
   #   engine: annas_archive
   #   shortcut: aaa
   #   # https://docs.searxng.org/dev/engines/online/annas_archive.html
-  #   aa_content: 'journal_article' # book_any .. magazine, standards_document
+  #   aa_content: 'magazine' # book_fiction, book_unknown, book_nonfiction, book_comic
   #   aa_ext: 'pdf'  # pdf, epub, ..
-  #   aa_sort: 'newest'  # newest, oldest, largest, smallest
+  #   aa_sort: oldest'  # newest, oldest, largest, smallest
 
   - name: apk mirror
     engine: apkmirror