fix: handling `$` in changesets

[jjangga0214]

When I use $ in a changeset, it generates wrong summary.

For example, I wrote the changeset like this.

---
'@haetae/utils': patch
---

A new Tagged Template Literal `$` and its interface `$Exec` are introduced. 
`$` is a wrapper of `utils.exec` and can replace it.

And the result is like this.

---

---

As you can see, $ is transformed strangely.