[FIX] python 3.7 is deprecated for flake, update flake version

Author: MiquelRForgeFlow

.github/workflows/flake.yml

@@ -15,10 +15,10 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.7
+          python-version: 3.8
       - uses: actions/checkout@v4
       - name: Configuration
-        run: pip install flake8==3.4.1
+        run: pip install flake8==4.0.1
       - name: Flake8 Script
         run: |
           flake8 odoo/openupgrade --max-line-length=120

addons/stock/migrations/13.0.1.1/post-migration.py

@@ -195,7 +195,7 @@ def map_stock_picking_responsible_responsible_id_to_user_id(env):
         return
 
     env.cr.execute(
-        f"""
+        """
         SELECT distinct rp.id,
                         rp.name,
                         rp.company_id,
@@ -225,7 +225,7 @@ def map_stock_picking_responsible_responsible_id_to_user_id(env):
     # map responsible_id to user_id
     openupgrade.logged_query(
         env.cr,
-        f"""
+        """
         WITH partner_user AS (
             SELECT sp.id AS picking_id,
                    rp.id AS partner_id,

addons/website/migrations/13.0.1.0/post-migration.py

@@ -48,7 +48,7 @@ def _set_data_anchor_xml_attribute(env):
     )
     for view in website_views:
         doc = fromstring(view.arch_db)
-        links = doc.cssselect("a[href^=\#]:not([href=\#])")
+        links = doc.cssselect(r"a[href^=\#]:not([href=\#])")
         if links:
             replacement = {
                 "selector": ", ".join([link.attrib["href"] for link in links]),