Update ls-qpack to v2.6.2 (#7516)

packages/l/ls-qpack/xmake.lua

@@ -6,6 +6,7 @@ package("ls-qpack")
     add_urls("https://github.com/litespeedtech/ls-qpack/archive/refs/tags/$(version).tar.gz",
              "https://github.com/litespeedtech/ls-qpack.git")
 
+    add_versions("v2.6.2", "db1a83102bb7d2d946a910cb11a9d69c1c5b9fd9a40249c22c411fb9c429fe16")
     add_versions("v2.6.1", "b6c91e8974876c69788fbb7d84c5d49a9a3c932c168fe353261923c742d3d635")
     add_versions("v2.6.0", "567a7a86f801eef5df28ce0cc89826d9008a57135027bdf63ba4a1d0639d0c58")
     add_versions("v2.5.5", "8770435b81d13616cf952bd361ec0e6e0fd79acff76dd9f6e75c18fd88b4c4f4")