chore: fix some typos in comments

Signed-off-by: Patrick Stoeckle <patrick.stoeckle@siemens.com>

libcontainer/configs/config.go

@@ -109,7 +109,7 @@ type Config struct {
 	Umask *uint32 `json:"umask,omitempty"`
 
 	// Readonlyfs will remount the container's rootfs as readonly where only externally mounted
-	// bind mounts are writtable.
+	// bind mounts are writable.
 	Readonlyfs bool `json:"readonlyfs,omitempty"`
 
 	// Specifies the mount propagation flags to be applied to /.

libcontainer/internal/userns/userns_maps_linux.c

@@ -9,7 +9,7 @@
 #include <stdlib.h>
 
 /*
- * All of the code here is run inside an aync-signal-safe context, so we need
+ * All of the code here is run inside an async-signal-safe context, so we need
  * to be careful to not call any functions that could cause issues. In theory,
  * since we are a Go program, there are fewer restrictions in practice, it's
  * better to be safe than sorry.