Update aws-c-common to v0.12.3 (#7154)

packages/a/aws-c-common/xmake.lua

@@ -6,6 +6,7 @@ package("aws-c-common")
     add_urls("https://github.com/awslabs/aws-c-common/archive/refs/tags/$(version).tar.gz",
              "https://github.com/awslabs/aws-c-common.git")
 
+    add_versions("v0.12.3", "a4e7ac6c6f840cb6ab56b8ee0bcd94a61c59d68ca42570bca518432da4c94273")
     add_versions("v0.12.2", "ecea168ea974f2da73b5a0adc19d9c5ebca73ca4b9f733de7c37fc453ee7d1c2")
     add_versions("v0.12.0", "765ca1be2be9b62a63646cb1f967f2aa781071f7780fdb5bbc7e9acfea0a1f35")
     add_versions("v0.11.3", "efcd2fb20f3149752fed87fa7901e933f3b1a64dfa4ac989f869ded87891bb3c")