Update sysinfo version to 0.26.7

src/main.rs

@@ -210,7 +210,7 @@ fn init_rayon() -> Result<(), ThreadPoolBuildError> {
     let large_stack = usize::pow(1024, 3);
     // Warning: Creating System is slow, takes ~ 100ms
     let s = System::new();
-    let available = s.get_available_memory() * 1024;
+    let available = s.available_memory();
 
     if available > large_stack.try_into().unwrap() {
         // Larger stack size to handle cases with lots of nested directories