Adopt the OCaml Code of Conduct

Signed-off-by: David Allsopp <[email protected]>

Author: dra27

CODE_OF_CONDUCT.md

@@ -0,0 +1,8 @@
+# Code of Conduct
+
+This project has adopted the [OCaml Code of Conduct](https://github.com/ocaml/code-of-conduct/blob/main/CODE_OF_CONDUCT.md).
+
+# Enforcement
+
+This project follows the OCaml Code of Conduct
+[enforcement policy](https://github.com/ocaml/code-of-conduct/blob/main/CODE_OF_CONDUCT.md#enforcement).

master_changes.md

@@ -254,6 +254,7 @@ users)
   * Remove Cygwin32 from testing, as it's been retired upstream [#5365 @dra27]
   * Ensure all the compilers can be built on Ubuntu 22.04 [#5391 @dra27]
   * Workaround brew problem on macOS GHA runner testing Z3 [#5405 @dra27]
+  * Adopt the OCaml Code of Conduct [#5419 @dra27]
 
 ## Release scripts
   * Make the release script setup-less using QEMU, Docker and Rosetta 2 [#4947 @kit-ty-kate]