[DPE-4573] Update to MySQL v8.0.39 (#172)

## Issue
We have new snap revisions for MySQL and related dependencies 8.0.39

## Solution
Update MySQL

Co-authored-by: Paulo Machado <[email protected]>

Author: shayancanonical

src/snap.py

@@ -25,8 +25,8 @@
 _SNAP_NAME = "charmed-mysql"
 REVISIONS: typing.Dict[str, str] = {
     # Keep in sync with `workload_version` file
-    "x86_64": "109",
-    "aarch64": "110",
+    "x86_64": "121",
+    "aarch64": "122",
 }
 revision = REVISIONS[platform.machine()]
 _snap = snap_lib.SnapCache()[_SNAP_NAME]

workload_version

@@ -1 +1 @@
-8.0.37
+8.0.39