message: Add version 3.2 to apidocmenu.md
diff: @@ -6,10 +6,11 @@ Stability indicates whether this driver is recommended for production use.
  Currently, no drivers guarantee API or ABI stability.
  | Family/version | Stability | Development | Purpose |
  -| -------------------- | ----------- | ------------------- | ------------------------------------------------------------ |
  +| -------------------- | ----------- | ------------------- | -------------------------------------
  | (repo master branch) | Unstable | Active development | New feature development |
  -| mongocxx 3.1.x | Stable | Bug fixes only | Current stable C++ driver release, requires C++11 |
  -| mongocxx 3.0.x | Stable | Critical fixes only | Previous stable C++ driver release, requires C++11 |
  +| mongocxx 3.2.x | Stable | Bug fixes only | Current stable C++ driver release
  +| mongocxx 3.1.x | Stable | Bug fixes only | Previous stable C++ driver release
  +| mongocxx 3.0.x | Stable | Critical fixes only | Previous stable C++ driver release
  ## Documentation versions available
  