Pin @primer/react to 38.19.0 to fix language picker scroll bug (#62342)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Copilot-Session: 7c094cdd-12e7-4752-9bff-9ff80fc00c11

Author: heiskr

package-lock.json

@@ -190,7 +190,7 @@
     "@primer/octicons": "^19.22.0",
     "@primer/octicons-react": "^19.22.0",
     "@primer/primitives": "^11.3.1",
-    "@primer/react": "^38.13.0",
+    "@primer/react": "38.19.0",
     "@primer/react-brand": "^0.70.0",
     "accept-language-parser": "^1.5.0",
     "ajv": "^8.18.0",