change tabs to accordions and make some other minor changes

Author: devalog

fern/products/sdks/guides/configure-global-headers.mdx

@@ -6,9 +6,7 @@ description: Guide to configuring global headers in your SDKs.
 Your API may leverage certain headers for every endpoint or most endpoints.
 These are called **global headers**.
 
-Fern automatically identifies headers that are used in every request, or the
-majority of requests, and marks them as global. You can manually configure additional
-global headers in either `api.yml` (Fern Definition) or `openapi.yml`.
+## How it works for SDK users
 
 Once you configure a global header (either automatically detected or manually
 specified), Fern generates an SDK that accepts this as a constructor parameter.
@@ -23,11 +21,14 @@ class Client:
   def __init__(self, *, apiKey: str):
 ```
 
-## Specifying Global Headers in a Fern Definition or OpenAPI spec
-<Tabs>
-<Tab title="Fern Definition">
+## Specifying global headers
+
+Fern automatically identifies headers that are used in every request, or the
+majority of requests, and marks them as global. You can manually configure additional
+global headers in either `api.yml` (Fern Definition) or `openapi.yml`.
 
-### Global Headers
+<AccordionGroup>
+<Accordion title="Fern Definition">
 
 To specify headers that are meant to be included on every request:
 
@@ -73,11 +74,11 @@ service:
 If you'd like to see this feature, please upvote [this issue](https://github.com/fern-api/fern/issues/2930).
 </Note>
 
-</Tab>
-<Tab title="OpenAPI">
+</Accordion>
+<Accordion title="OpenAPI">
 
-### Global Headers
-Use the `x-fern-global-headers` extension to label additional headers as global or to alias the names of global headers:
+Use the `x-fern-global-headers` extension to label additional headers as global
+or to alias the names of global headers:
 
 ```yaml title="openapi.yml"
 x-fern-global-headers:
@@ -96,5 +97,5 @@ class Client:
 
   def __init__(self, *, apiKey: str, userpoolId: typing.Optional[str])
 ```
-</Tab>
-</Tabs>
+</Accordion>
+</AccordionGroup>