Bump Iceberg in CI (#2288)

# Rationale for this change

Just a small bump, noticed this while working on some other stuff

# Are these changes tested?

# Are there any user-facing changes?

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Author: Fokko

tests/conftest.py

@@ -2501,7 +2501,7 @@ def spark() -> "SparkSession":
     # Remember to also update `dev/Dockerfile`
     spark_version = ".".join(importlib.metadata.version("pyspark").split(".")[:2])
     scala_version = "2.12"
-    iceberg_version = "1.9.0"
+    iceberg_version = "1.9.2"
 
     os.environ["PYSPARK_SUBMIT_ARGS"] = (
         f"--packages org.apache.iceberg:iceberg-spark-runtime-{spark_version}_{scala_version}:{iceberg_version},"