Merge tag 'v6.7.8' into dev

# Conflicts:
#	.github/workflows/mac_packaged.yml
#	Telegram/Resources/winrc/Telegram.rc
#	Telegram/Resources/winrc/Updater.rc
#	Telegram/SourceFiles/api/api_chat_invite.h
#	Telegram/SourceFiles/boxes/language_box.cpp
#	Telegram/SourceFiles/boxes/send_files_box.h
#	Telegram/SourceFiles/boxes/sticker_set_box.cpp
#	Telegram/SourceFiles/core/version.h
#	Telegram/SourceFiles/data/data_types.h
#	Telegram/SourceFiles/history/history_item.cpp
#	Telegram/SourceFiles/history/history_widget.cpp
#	Telegram/SourceFiles/history/view/history_view_chat_section.cpp
#	Telegram/SourceFiles/history/view/history_view_message.cpp
#	Telegram/SourceFiles/history/view/history_view_translate_bar.cpp
#	Telegram/SourceFiles/history/view/history_view_translate_tracker.cpp
#	Telegram/SourceFiles/platform/mac/main_window_mac.mm
#	Telegram/SourceFiles/settings/sections/settings_main.cpp
#	Telegram/lib_ui
#	snap/snapcraft.yaml

.github/workflows/changelog.yml

@@ -44,4 +44,4 @@ jobs:
     steps:
       - name: Deploy to GitHub Pages
         id: deploy
-        uses: actions/deploy-pages@v4
+        uses: actions/deploy-pages@v5

.github/workflows/unused_styles_updater.yml

@@ -0,0 +1,16 @@
+name: Unused styles updater.
+
+on:
+  repository_dispatch:
+    types: ["Restart unused_styles_updater workflow."]
+  schedule:
+    - cron: "0 3 1 * *"
+  workflow_dispatch:
+
+jobs:
+  Unused-styles:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: desktop-app/action_code_updater@master
+        with:
+          type: "unused-styles"