Update djinni project URL

The original project has been retired and is only as a read only git
repo available.

Development of djinni happens nowadays via https://github.com/cross-language-cpp

The submitted link points to the documentation site.

README.md

@@ -843,7 +843,7 @@ A curated list of awesome C++ (or C) frameworks, libraries, resources, and shiny
 * [ChaiScript](https://github.com/ChaiScript/ChaiScript/) - An easy to use embedded scripting language for C++. [BSD] [website](http://chaiscript.com/)
 * [ctypes.sh](https://github.com/taviso/ctypes.sh) - A foreign function interface for bash. [MIT]
 * [Cython](https://github.com/cython/cython) - Cython is an optimising static compiler for both the Python programming language and the extended Cython programming language (based on Pyrex). It makes writing C extensions for Python as easy as Python itself. [Apache] [website](http://cython.org/)
-* [djinni](https://github.com/dropbox/djinni) - A tool for generating cross-language type declarations and interface bindings. [Apache2]
+* [djinni](https://djinni.xlcpp.dev) - A tool for generating cross-language type declarations and interface bindings. [Apache2]
 * [Duktape](https://github.com/svaarala/duktape) - An embeddable Javascript engine with compact footprint. [MIT] [website](http://duktape.org)
 * [JavaCpp](https://github.com/bytedeco/javacpp) - The missing bridge between Java and native C++. [Apache2]
 * [libffi](https://github.com/libffi/libffi) - A portable foreign-function interface library. [MIT] [website](https://sourceware.org/libffi/)