ci(pre-commit): Include : in version_files regex

Commitizen runs bump on itself to, among other things, manage the
version it uses of its own pre-commit hooks. When searching
.pre-commit-config.yaml for the version number of Commitizen, look for
"rev:" rather than "rev" to reduce the likelihood of a false positive
now that colons are permitted in version_files regexes.

Author: Kurt-von-Laven

pyproject.toml

@@ -4,7 +4,7 @@ tag_format = "v$version"
 version_files = [
   "pyproject.toml:version",
   "commitizen/__version__.py",
-  ".pre-commit-config.yaml:rev.\\s+(?=[^\\n]+Commitizen)"
+  ".pre-commit-config.yaml:rev:.\\s+(?=[^\\n]+Commitizen)"
 ]
 
 [tool.black]