Bump @polar-sh/astro from 0.7.3 to 0.7.5 (#3415)

Bumps [@polar-sh/astro](https://github.com/polarsource/polar) from 0.7.3 to 0.7.5.
- [Release notes](https://github.com/polarsource/polar/releases)
- [Commits](https://github.com/polarsource/polar/commits)

---
updated-dependencies:
- dependency-name: "@polar-sh/astro"
  dependency-version: 0.7.5
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

landing/package.json

@@ -13,7 +13,7 @@
   "dependencies": {
     "@astrojs/mdx": "^5.0.2",
     "@astrojs/vercel": "^9.0.4",
-    "@polar-sh/astro": "^0.7.3",
+    "@polar-sh/astro": "^0.7.5",
     "astro": "^5.18.0",
     "shepherd.js": "workspace:*"
   },