[code-quality] Organise core imports (#7149)

esphome/git.py

@@ -1,12 +1,12 @@
-import hashlib
-import logging
-import re
-import subprocess
-import urllib.parse
 from dataclasses import dataclass
 from datetime import datetime
+import hashlib
+import logging
 from pathlib import Path
+import re
+import subprocess
 from typing import Callable, Optional
+import urllib.parse
 
 import esphome.config_validation as cv
 from esphome.core import CORE, TimePeriodSeconds