config/network/wpa_supplicant: add WPA3/SAE info

Author: sburris0

src/config/network/wpa_supplicant.md

@@ -39,7 +39,7 @@ $ echo -n <passphrase> | iconv -t utf16le | openssl md4
 ## WEP
 
 For WEP configuration, add the following lines to your device's
-`wpa-supplicant.conf`:
+`wpa_supplicant.conf`:
 
 ```
 network={
@@ -51,6 +51,19 @@ network={
 }
 ```
 
+## WPA3-SAE
+
+SAE (used for WPA3) can be configured in `wpa_supplicant.conf` as follows:
+
+```
+network={
+    ssid="MYSSID"
+    key_mgmt=SAE
+    sae_password="YOUR AP PASSWORD"
+    ieee80211w=2
+}
+```
+
 ### The wpa_supplicant service
 
 The `wpa_supplicant` service checks the following options in