chore: pin @camunda8/openapi-docs to ~4.6.5

Temporary pin until we upgrade to Docusaurus 3.10.0 + @camunda8/*@5.x.

The @camunda8 4.x packages declare peerDependencies <3.10.0 for Docusaurus,
which will warn on mismatch if Docusaurus is bumped independently.

Author: emilyoram

package-lock.json

@@ -43,10 +43,10 @@
     "@bpmn-io/form-js": "^1.15.2",
     "@camunda8/docusaurus-plugin-openapi-docs": "~4.6.5",
     "@camunda8/docusaurus-theme-openapi-docs": "~4.6.5",
-    "@docusaurus/core": ">=3.8.0 <3.10.0",
-    "@docusaurus/faster": ">=3.8.0 <3.10.0",
-    "@docusaurus/preset-classic": ">=3.8.0 <3.10.0",
-    "@docusaurus/theme-mermaid": ">=3.8.0 <3.10.0",
+    "@docusaurus/core": "^3.8.0",
+    "@docusaurus/faster": "^3.8.0",
+    "@docusaurus/preset-classic": "^3.8.0",
+    "@docusaurus/theme-mermaid": "^3.8.0",
     "@mdx-js/react": "^3.1.0",
     "@saucelabs/theme-github-codeblock": "^0.3.0",
     "cheerio": "^1.1.2",