Merge pull request swiftlang#81609 from swiftlang/egorzhdan/disable-std-function-rhel

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

Author: egorzhdan

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=fedora-41
 // XFAIL: LinuxDistribution=debian-12