fix(deps): update dependency @mui/joy to v5.0.0-beta.50 (#316)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [@mui/joy](https://v5.mui.com/joy-ui/getting-started/)
([source](https://redirect.github.com/mui/material-ui/tree/HEAD/packages/mui-joy))
| [`5.0.0-beta.48` ->
`5.0.0-beta.50`](https://renovatebot.com/diffs/npm/@mui%2fjoy/5.0.0-beta.48/5.0.0-beta.50)
|
[![age](https://developer.mend.io/api/mc/badges/age/npm/@mui%2fjoy/5.0.0-beta.50?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/@mui%2fjoy/5.0.0-beta.50?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/@mui%2fjoy/5.0.0-beta.48/5.0.0-beta.50?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/@mui%2fjoy/5.0.0-beta.48/5.0.0-beta.50?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

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wiki.creatorsgarten.org/package.json

@@ -20,7 +20,7 @@
     "@contentsgarten/server-utils": "workspace:*",
     "@emotion/react": "^11.10.6",
     "@emotion/styled": "^11.10.6",
-    "@mui/joy": "5.0.0-beta.48",
+    "@mui/joy": "5.0.0-beta.50",
     "@sentry/astro": "^7.88.0",
     "@tailwindcss/typography": "^0.5.3",
     "@tanstack/react-query": "^4.26.1",

wiki.wonderful.software/package.json

@@ -14,7 +14,7 @@
     "@contentsgarten/server-utils": "workspace:*",
     "@emotion/react": "^11.10.6",
     "@emotion/styled": "^11.10.6",
-    "@mui/joy": "5.0.0-beta.48",
+    "@mui/joy": "5.0.0-beta.50",
     "@tailwindcss/typography": "^0.5.3",
     "@tanstack/react-query": "^4.26.1",
     "@trpc/client": "^10.16.0",