Use everywhere python3 in the examples
--- a/examples/ble_chat.py
+++ b/examples/ble_chat.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 
 import asyncio
 import sys
--- a/examples/ble_stats.py
+++ b/examples/ble_stats.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 
 import asyncio
 import argparse
--- a/examples/ble_t1000_chan_msg.py
+++ b/examples/ble_t1000_chan_msg.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 
 import asyncio
 import json
--- a/examples/ble_t1000_custom_vars.py
+++ b/examples/ble_t1000_custom_vars.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 
 import asyncio
 from meshcore import MeshCore
--- a/examples/ble_t1000_infos.py
+++ b/examples/ble_t1000_infos.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 
 import asyncio
 
--- a/examples/ble_t1000_msg.py
+++ b/examples/ble_t1000_msg.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 
 import asyncio
 from meshcore import MeshCore
--- a/examples/ble_t1000_msg_retries.py
+++ b/examples/ble_t1000_msg_retries.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 
 import asyncio
 from meshcore import MeshCore
--- a/examples/ble_t1000_set_cv.py
+++ b/examples/ble_t1000_set_cv.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 
 import asyncio
 from meshcore import MeshCore
--- a/examples/mepo_mc_gps.py
+++ b/examples/mepo_mc_gps.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 DISPLAYNAME="Center at MC node location"
 
 import asyncio
--- a/examples/serial_chat.py
+++ b/examples/serial_chat.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 
 import asyncio
 import sys
--- a/examples/serial_contacts.py
+++ b/examples/serial_contacts.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 
 import asyncio
 import json
--- a/examples/serial_infos.py
+++ b/examples/serial_infos.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 
 import asyncio
 from meshcore import MeshCore, EventType
--- a/examples/serial_msg.py
+++ b/examples/serial_msg.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 """
 Example of sending a message and waiting for its specific acknowledgment
 using event attribute filtering.
--- a/examples/serial_repeater_status.py
+++ b/examples/serial_repeater_status.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 
 import asyncio
 import argparse
--- a/examples/serial_repeater_telemetry.py
+++ b/examples/serial_repeater_telemetry.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 
 import asyncio
 import argparse
--- a/examples/tcp_chat.py
+++ b/examples/tcp_chat.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 
 import asyncio
 import sys
--- a/examples/tcp_login_status.py
+++ b/examples/tcp_login_status.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 
 import asyncio
 import argparse
--- a/examples/tcp_mchome_contacts.py
+++ b/examples/tcp_mchome_contacts.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 
 import asyncio
 import json
--- a/examples/tcp_mchome_infos.py
+++ b/examples/tcp_mchome_infos.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 
 import asyncio
 
--- a/examples/tcp_mchome_msg.py
+++ b/examples/tcp_mchome_msg.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 
 import asyncio
 import json
--- a/examples/tcp_mchome_readmsgs.py
+++ b/examples/tcp_mchome_readmsgs.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 
 import asyncio
 import json
