Bump pre-release version to 0.22.0pre4 (#983)

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Co-authored-by: Claude <noreply@anthropic.com>

Author: danielchalef

pyproject.toml

@@ -1,7 +1,7 @@
 [project]
 name = "graphiti-core"
 description = "A temporal graph building library"
-version = "0.22.0pre3"
+version = "0.22.0pre4"
 authors = [
     { name = "Paul Paliychuk", email = "paul@getzep.com" },
     { name = "Preston Rasmussen", email = "preston@getzep.com" },