Fix copy paste error in libusb_free_* docs

Closes #535

Signed-off-by: Nathan Hjelm <hjelmn@me.com>

libusb/descriptor.c

diff --git a/libusb/descriptor.c b/libusb/descriptor.c
index 7ee3090..53905e6 100644
--- a/libusb/descriptor.c
+++ b/libusb/descriptor.c
@@ -492,7 +492,7 @@
 {
 	struct libusb_config_descriptor *_config = malloc(sizeof(*_config));
 	int r;
-	
+
 	if (!_config)
 		return LIBUSB_ERROR_NO_MEM;
 
@@ -504,7 +504,7 @@
 	} else if (r > 0) {
 		usbi_warn(ctx, "still %d bytes of descriptor data left", r);
 	}
-	
+
 	*config = _config;
 	return LIBUSB_SUCCESS;
 }
@@ -1060,7 +1060,8 @@
  * It is safe to call this function with a NULL ss_usb_device_cap
  * parameter, in which case the function simply returns.
  *
- * \param ss_usb_device_cap the USB 2.0 Extension descriptor to free
+ * \param ss_usb_device_cap the SuperSpeed USB Device Capability descriptor
+ * to free
  */
 void API_EXPORTED libusb_free_ss_usb_device_capability_descriptor(
 	struct libusb_ss_usb_device_capability_descriptor *ss_usb_device_cap)
@@ -1117,7 +1118,7 @@
  * It is safe to call this function with a NULL container_id parameter,
  * in which case the function simply returns.
  *
- * \param container_id the USB 2.0 Extension descriptor to free
+ * \param container_id the Container ID descriptor to free
  */
 void API_EXPORTED libusb_free_container_id_descriptor(
 	struct libusb_container_id_descriptor *container_id)

libusb/version_nano.h

diff --git a/libusb/version_nano.h b/libusb/version_nano.h
index bc7fc4e..af03632 100644
--- a/libusb/version_nano.h
+++ b/libusb/version_nano.h
@@ -1 +1 @@
-#define LIBUSB_NANO 11350
+#define LIBUSB_NANO 11351