Lua: update to pandoc-lua-marshal version 0.2.7.

This fixes counterintuitive behavior of the `content` property on
BulletList and OrderedList items. Unmarshalling of that field now
matches the behavior of the constructor.

Fixes: #8916

pandoc-lua-engine/pandoc-lua-engine.cabal

@@ -119,7 +119,7 @@ library
                      , lpeg                  >= 1.1     && < 1.2
                      , mtl                   >= 2.2     && < 2.4
                      , pandoc                >= 3.1.4   && < 3.2
-                     , pandoc-lua-marshal    >= 0.2.6   && < 0.3
+                     , pandoc-lua-marshal    >= 0.2.7   && < 0.3
                      , pandoc-types          >= 1.22    && < 1.24
                      , parsec                >= 3.1     && < 3.2
                      , text                  >= 1.1.1   && < 2.2

stack.yaml

@@ -14,7 +14,7 @@ extra-deps:
 - commonmark-extensions-0.2.5.4
 - commonmark-pandoc-0.2.2.1
 - hslua-module-zip-1.1.3
-- pandoc-lua-marshal-0.2.6
+- pandoc-lua-marshal-0.2.7
 - tls-2.0.2
 - skylighting-format-blaze-html-0.1.1.2
 - skylighting-core-0.14.1.1