jira: certain characters seem to be causing an endless stream of annotations

Every time I sync my tasks, this comment: gets re-added as an annotation.

The comment is as follows:

```
These may be variants of:
U+26911 𦤑
U+2690E 𦤎
U+76A1 皡
U+76A5 皥
U+76B7 皷
```

so my annotation log looks like this:

```
2020-11-25 15:48:43 @Steven R. Loomis - These may be variants of: ⚑1 ������⚐
2020-11-27 13:31:23 @Steven R. Loomis - These may be variants of: ⚑1 ������⚐
2020-12-01 09:31:06 @Steven R. Loomis - These may be variants of: ⚑1 ������⚐
2020-12-02 14:28:24 @Steven R. Loomis - These may be variants of: ⚑1 ������⚐
2020-12-04 10:00:01 @Steven R. Loomis - These may be variants of: ⚑1 ������⚐
```

Clearly scrambled. Worse, this task gets 'updated' every time bugwarrior-pull runs.