Bump version for release.

NEWS

@@ -1,4 +1,4 @@
-2.0.8.dev0
+2.0.8
  * #1114: Document systemd configuration changes for the ZFS filesystem hook.
  * #1116: Add dumping of database containers via their container names, handy for backing up
    database containers from the host. See the documentation for more information:

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "borgmatic"
-version = "2.0.8.dev0"
+version = "2.0.8"
 authors = [
   { name="Dan Helfman", email="witten@torsion.org" },
 ]