upgrade to 0.22.6

Summary: Upgrade `pyo3` to [`0.22.6`](https://fburl.com/g3zxt353)

Reviewed By: zertosh

Differential Revision: D68466072

fbshipit-source-id: 9e52e76164584477fc9a21daefb8a49feaf664c1

app/buck2_util/src/os/macos/host_cpu_load_info.rs

@@ -43,6 +43,10 @@ pub fn host_cpu_load_info() -> buck2_error::Result<HostCpuLoadInfo> {
         };
 
         let res = libc::host_statistics64(
+            // TODO libc::mach_host_self is deprecated and is not yet part of the
+            // suggested `mach2` crate (https://github.com/JohnTitor/mach2/issues/34)
+            // Someone needs to add it upstream or implement a different route!
+            #[allow(deprecated)]
             libc::mach_host_self(),
             libc::HOST_CPU_LOAD_INFO,
             &mut host_info as *mut _ as *mut libc::integer_t,