drop 3.9, fix typo in pyproject.toml

Signed-off-by: Max Chesterfield <max.chesterfield@zepben.com>

Author: chestm007

pyproject.toml

@@ -16,9 +16,9 @@ build-backend = "setuptools.build_meta"
 name = "zepben.examples"
 description = "Module containing examples for interacting with Zepben's platform"
 version = "0.4.0b2"
-readme = {file = "README.md", content-type = "test/markdown"}
+readme = {file = "README.md", content-type = "text/markdown"}
 license = "MPL-2.0"
-requires-python = '>=3.9,<3.13'
+requires-python = '>=3.10,<3.13'
 authors = [
     {name = "Zeppelin Bend", email = "oss@zepben.com"}
 ]
@@ -34,7 +34,6 @@ dependencies = [
 ]
 classifiers = [
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",