build: unpin opentelemetry-util-genai version

Author: argaj

instrumentation-genai/opentelemetry-instrumentation-google-genai/pyproject.toml

@@ -40,8 +40,9 @@ dependencies = [
   "opentelemetry-api >=1.37, <2",
   "opentelemetry-instrumentation >=0.58b0, <2",
   "opentelemetry-semantic-conventions >=0.58b0, <2",
-  "opentelemetry-util-genai >= 0.1b0"
-]
+  # TODO https://github.com/open-telemetry/opentelemetry-python-contrib/issues/3786: restrict
+  # version after the first release
+  "opentelemetry-util-genai",]
 
 [project.optional-dependencies]
 instruments = [