set the default python_version string_flag to make the selects work

Author: aignas

examples/bzlmod/.bazelrc

@@ -1,4 +1,4 @@
-common --experimental_enable_bzlmod
+common --enable_bzlmod
 
 coverage --java_runtime_version=remotejdk_11
 
@@ -8,3 +8,6 @@ test --test_output=errors --enable_runfiles
 build --enable_runfiles
 
 startup --windows_enable_symlinks
+
+# Set the default version of python_version config
+common --@rules_python//python/config_settings:python_version=3.9.18

examples/bzlmod/MODULE.bazel

@@ -112,6 +112,8 @@ pip.parse(
         "cp39_linux_*",
         "cp39_*",
         # NOTE: Adding multiple version right now does not work yet.
+        "cp310_*",
+        "cp311_*",
     ],
     hub_name = "pip",
     python_version = "3.9",