Port to PyQt6

Author: manateelazycat

buffer.py

@@ -20,9 +20,9 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 
-from PyQt5 import QtCore
-from PyQt5.QtCore import QUrl
-from PyQt5.QtCore import QFileSystemWatcher
+from PyQt6 import QtCore
+from PyQt6.QtCore import QUrl
+from PyQt6.QtCore import QFileSystemWatcher
 from core.browser import BrowserBuffer
 import markdown
 

md_mermaid.py

@@ -12,7 +12,7 @@
 
 from markdown.extensions import Extension
 from markdown.preprocessors import Preprocessor
-from PyQt5.QtCore import QUrl
+from PyQt6.QtCore import QUrl
 
 import re
 import os