typo: version number miss zero

Signed-off-by: NHongjin Li <lihongjin1@huawei.com>
Change-Id: Ibe4982810e7d76a95b2b942c4aecc3dc68e3ed46

README.OpenSource

@@ -3,7 +3,7 @@
         "Name"                  : "NuttX",
         "License"               : "Apache License V2.0",
         "License File"          : "LICENSE",
-        "Version Number"        : "10.2",
+        "Version Number"        : "10.2.0",
         "Owner"                 : "tonghaoyang1@huawei.com",
         "Upstream URL"          : "http://www.nuttx.org",
         "Description"           : "Apache NuttX is a mature, real-time embedded operating system (RTOS)."