Upgrade telegram to version 5.12.1

Upgrade telegram to version 5.12.1, skip 5.12.0 version.
Changelog:
- https://github.com/telegramdesktop/tdesktop/blob/v5.12.1/changelog.txt
- https://github.com/telegramdesktop/tdesktop/releases/tag/v5.12.0
- https://github.com/telegramdesktop/tdesktop/releases/tag/v5.12.1

Author: huiyifyj

bucket/telegram.json

@@ -1,12 +1,12 @@
 {
-    "version": "5.11.1",
+    "version": "5.12.1",
     "homepage": "https://telegram.org",
     "description": "A messaging app with a focus on speed and security.",
     "license": "GPL-3.0-only",
     "architecture": {
         "64bit": {
-            "url": "https://github.com/telegramdesktop/tdesktop/releases/download/v5.11.1/tportable-x64.5.11.1.zip",
-            "hash": "fb94520d88858b9bc42f248b8df22125fb7ca5bab79b519e5ff5603bf1f96385"
+            "url": "https://github.com/telegramdesktop/tdesktop/releases/download/v5.12.1/tportable-x64.5.12.1.zip",
+            "hash": "6d3f29542bb4f57be3bd0553ef0328749723e63c654e763469dabee44b1800f3"
         }
     },
     "extract_dir": "Telegram",