Merge pull request #81812 from rjmansfield/disable_use_std_func_ubi9

[6.2] [cxx-interop] Temporarily disable a test for `std::function` on UBI 9

Author: shahmishal

test/Interop/Cxx/stdlib/use-std-function.swift

@@ -15,6 +15,7 @@
 // XFAIL: LinuxDistribution=rhel-9.3
 // XFAIL: LinuxDistribution=rhel-9.4
 // XFAIL: LinuxDistribution=rhel-9.5
+// XFAIL: LinuxDistribution=rhel-9.6
 // XFAIL: LinuxDistribution=fedora-39
 // XFAIL: LinuxDistribution=debian-12