Document SWIG global scope VOCAB fix and test

- Update release notes on parent commits ccea1f5 (fix)
  and 9508e31 (test) for SWIG global scope VOCAB.

doc/release/v2_3_72_1.md

@@ -85,10 +85,11 @@ yarpserver is launched with `--ros` option. (#722)
 
 * Fixed out of source builds.
 * Added `SWIG_PREPROCESSOR_SHOULD_SKIP_THIS` to avoid the SWIG preprocessor from
-  parsing `VOCAB`. This avoids hacks required for compilation of bindings (hacks
-  removed), and enables the correct generation of `VOCAB`s inside `enum`s.
+  parsing `VOCAB`. Introduced SWIG-compliant working `VOCAB` definitions in
+  `yarp.i`, with required checks on target language and SWIG version.
+* Removed related hacks required for compilation from YARP internals.
 * Added `test_vocab.lua` to catch regressions on `VOCAB` in the future.
-* Rename `test_string.lua` to more representative `test_port.lua`, enable it to
+* Renamed `test_string.lua` to more representative `test_port.lua`, enabled it to
   run without the `yarpserver`, and integrate it in the test infrastructure.
 
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