fix(bump): manual version bump if prerelease offset is configured

If you use the prerelase offset in the .cz.toml, as in the following
example, no bump with a manual version number is possible.

The error occurs when bumping with manual version number:
cz  bump 9.8.7
--prerelease-offset cannot be combined with MANUAL_VERSION

```toml
[tool.commitizen]
changelog_incremental = true
tag_format = "v$version"
update_changelog_on_bump = true
version = "1.2.0b13"
prerelease_offset = 1
```

Author: ckagerer

commitizen/commands/bump.py

@@ -187,11 +187,6 @@ def __call__(self) -> None:  # noqa: C901
                     "--major-version-zero cannot be combined with MANUAL_VERSION"
                 )
 
-            if prerelease_offset:
-                raise NotAllowed(
-                    "--prerelease-offset cannot be combined with MANUAL_VERSION"
-                )
-
             if get_next:
                 raise NotAllowed("--get-next cannot be combined with MANUAL_VERSION")
 

docs/commands/bump.md

@@ -599,7 +599,7 @@ post_bump_hooks = [
 
 ### `prerelease_offset`
 
-Offset with which to start counting prereleses.
+Offset with which to start counting prereleases.
 
 Defaults to: `0`