Bump dynstr

The commit below is relevant to fix CMake builds:

Author: Xavier Del Campo Romero <xavi.dcr@tutanota.com>
Date:   Fri Nov 10 14:43:39 2023 +0100

    CMakeLists.txt: Fix missing parameter names

    VERSION must be indicated when passing a version string to project().
    Also, LANGUAGES must be also be passed when the language name is not the
    only argument to project() (apart from the project name itself).

1 files changed, 0 insertions, 0 deletions

diff --git a/dynstr b/dynstr
-Subproject e7b84e0bf6695cf1dd465b90bd3d8797ec61832
+Subproject 7be16e6e5cfd8e2481a470474f7e41e127e9eba