Update packse to include --python-platform (#10531)

## Summary

Relevant for: https://github.com/astral-sh/uv/pull/10527.

scripts/scenarios/requirements.txt

@@ -10,7 +10,7 @@ msgspec==0.18.6
     # via packse
 packaging==24.2
     # via hatchling
-packse==0.3.42
+packse==0.3.43
     # via -r scripts/scenarios/requirements.in
 pathspec==0.12.1
     # via hatchling

scripts/scenarios/templates/install.mustache

@@ -88,6 +88,9 @@ fn {{module_name}}() {
         .arg("--no-binary")
         .arg("{{.}}")
         {{/resolver_options.no_binary}}
+        {{#resolver_options.python_platform}}
+        .arg("--python-platform={{.}}")
+        {{/resolver_options.python_platform}}
         {{#root.requires}}
         .arg("{{requirement}}")
         {{/root.requires}}, @r###"<snapshot>