Update aws-c-auth to v0.7.29 (#5193)

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

@@ -6,6 +6,7 @@ package("aws-c-auth")
     add_urls("https://github.com/awslabs/aws-c-auth/archive/refs/tags/$(version).tar.gz",
              "https://github.com/awslabs/aws-c-auth.git")
 
+    add_versions("v0.7.29", "f49f5dce1153e908dd9c0639f4aa4b1477f8564a28635f433cc0be121a18106e")
     add_versions("v0.7.25", "8f7993f8fad2992ca19c00123ea16e72c4d13acbeeb6333061034a299274f081")
     add_versions("v0.7.22", "f249a12a6ac319e929c005fb7efd5534c83d3af3a3a53722626ff60a494054bb")
     add_versions("v0.7.18", "c705199655066f1f874bc3758683f32e288024196a22f28360d336231e45406f")