docs: use same base URL and plant-themed sub-paths in example

Co-Authored-By: kenny <kenny@buildwithfern.com>

Author: devin-ai-integration[bot]

fern/products/docs/pages/preview-publish/multi-source.mdx

@@ -107,11 +107,11 @@ A recommended pattern is to use four separate `fern/` projects — one for the h
 <Tabs>
 <Tab title="Homepage">
 ```yaml Homepage — docs.yml
-global-theme: acme-theme
+global-theme: plantstore-theme
 
 instances:
-  - url: acme.docs.buildwithfern.com
-    custom-domain: docs.acme.com
+  - url: plantstore.docs.buildwithfern.com
+    custom-domain: docs.plantstore.com
     multi-source: true
 
 navigation:
@@ -123,25 +123,25 @@ The homepage `home.mdx` can use cards to direct users to each team's docs:
 
 ```jsx home.mdx
 <CardGroup>
-  <Card title="AI Performance" icon="fa-regular fa-gauge" href="https://docs.acme.com/aiperf">
-    Benchmarking and optimization tools.
+  <Card title="Seeds" icon="fa-regular fa-seedling" href="https://docs.plantstore.com/seeds">
+    Seed catalog and germination guides.
   </Card>
-  <Card title="AI Store" icon="fa-regular fa-store" href="https://docs.acme.com/aistore">
-    Model marketplace and deployment.
+  <Card title="Greenhouses" icon="fa-regular fa-warehouse" href="https://docs.plantstore.com/greenhouses">
+    Climate control and monitoring.
   </Card>
-  <Card title="Dynamo" icon="fa-regular fa-bolt" href="https://docs.acme.com/dynamo">
-    Real-time inference engine.
+  <Card title="Nursery" icon="fa-regular fa-leaf" href="https://docs.plantstore.com/nursery">
+    Plant care and propagation.
   </Card>
 </CardGroup>
 ```
 </Tab>
-<Tab title="Team A">
-```yaml Team A — docs.yml
-global-theme: acme-theme
+<Tab title="Seeds team">
+```yaml Seeds team — docs.yml
+global-theme: plantstore-theme
 
 instances:
-  - url: acme-aiperf.docs.buildwithfern.com/aiperf
-    custom-domain: docs.acme.com/aiperf
+  - url: plantstore.docs.buildwithfern.com/seeds
+    custom-domain: docs.plantstore.com/seeds
     multi-source: true
 
 navigation:
@@ -151,13 +151,13 @@ navigation:
         path: ./pages/overview.mdx
 ```
 </Tab>
-<Tab title="Team B">
-```yaml Team B — docs.yml
-global-theme: acme-theme
+<Tab title="Greenhouses team">
+```yaml Greenhouses team — docs.yml
+global-theme: plantstore-theme
 
 instances:
-  - url: acme-aistore.docs.buildwithfern.com/aistore
-    custom-domain: docs.acme.com/aistore
+  - url: plantstore.docs.buildwithfern.com/greenhouses
+    custom-domain: docs.plantstore.com/greenhouses
     multi-source: true
 
 navigation:
@@ -167,13 +167,13 @@ navigation:
         path: ./pages/overview.mdx
 ```
 </Tab>
-<Tab title="Team C">
-```yaml Team C — docs.yml
-global-theme: acme-theme
+<Tab title="Nursery team">
+```yaml Nursery team — docs.yml
+global-theme: plantstore-theme
 
 instances:
-  - url: acme-dynamo.docs.buildwithfern.com/dynamo
-    custom-domain: docs.acme.com/dynamo
+  - url: plantstore.docs.buildwithfern.com/nursery
+    custom-domain: docs.plantstore.com/nursery
     multi-source: true
 
 navigation:
@@ -185,7 +185,7 @@ navigation:
 </Tab>
 </Tabs>
 
-All four repositories share `acme-theme` for consistent branding. Each publishes independently — updating Team A's docs has no effect on the homepage or other teams.
+All four repositories share `plantstore-theme` for consistent branding. Each publishes independently — updating the Seeds team's docs has no effect on the homepage or other teams.
 
 ## Properties