Add C++ Client release note 3.7.2 (#1025)

Author: BewareMyPower

data/release-cpp.js

@@ -0,0 +1,14 @@
+---
+id: client-cpp-3.7.2
+title: Client CPP 3.7.2
+sidebar_label: Client CPP 3.7.2
+---
+
+**What's Changed**
+
+* Remove static link to libstdc++ to avoid conflicts by @BewareMyPower in https://github.com/apache/pulsar-client-cpp/pull/493
+* Fix acknowledgeCumulative never returns when accepting an invalid message id for a multi-topics consumer by @BewareMyPower in https://github.com/apache/pulsar-client-cpp/pull/492
+* Avoid getLastMessageId RPC when calling hasMessageAvailable after seek by timestamp by @BewareMyPower in https://github.com/apache/pulsar-client-cpp/pull/491
+* Fix stage-release.sh does not delete the Windows temporary directories by @BewareMyPower in https://github.com/apache/pulsar-client-cpp/pull/488
+
+**Full Changelog**: https://github.com/apache/pulsar-client-cpp/compare/v3.7.1...v3.7.2