fix(scripts): switch all scripts to python3 (#2820)

* fix(scripts): switch all to python3

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>

* fix(changelog-template.hbs): remove the duplicated message fix

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>

docs/conf.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python3.7
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 #
 # LVGL documentation build configuration file, created by

scripts/built_in_font/built_in_font_gen.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python3.6
+#!/usr/bin/env python3
 
 import argparse
 from argparse import RawTextHelpFormatter

scripts/built_in_font/generate_all.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python3.6
+#!/usr/bin/env python3
 
 import os
 

scripts/changelog-template.hbs

@@ -47,7 +47,7 @@
   {{/commit-list}}
 
   ### Fixes
-  {{#commit-list merges heading='' message='^fix'  message='^fix' exclude='(^fix conflict|^fix warning|BREAKING CHANGE)'}}
+  {{#commit-list merges heading='' message='^fix' exclude='(^fix conflict|^fix warning|BREAKING CHANGE)'}}
     - {{message}} [`{{id}}`]({{href}})
   {{/commit-list}}
   {{#commit-list commits heading='' message='^fix' exclude='(^fix conflict|^fix warning|BREAKING CHANGE)'}}

scripts/release/com.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 import sys
 import os.path