Update aws-checksums to v0.2.7 (#7266)

packages/a/aws-checksums/xmake.lua

@@ -6,6 +6,7 @@ package("aws-checksums")
     add_urls("https://github.com/awslabs/aws-checksums/archive/refs/tags/$(version).tar.gz",
              "https://github.com/awslabs/aws-checksums.git")
 
+    add_versions("v0.2.7", "178e8398d98111f29150f7813a70c20ad97ab30be0de02525440355fe84ccb1d")
     add_versions("v0.2.3", "c688f311db8a1b70bb6d22f6e8f2817b39e1419546e339cf753d61340969eeb4")
     add_versions("v0.2.2", "96acfea882c06acd5571c845e4968892d6ffc0fae81b31a0b1565100049743b2")
     add_versions("v0.2.0", "aae619de7fb5908a52223eae3b80fae70260eed5919ad4c385b2d5a144a641f0")