docs(sidebars.js): add jina ai embedding to docs

docs/my-website/docs/providers/jina_ai.md

@@ -0,0 +1,24 @@
+# Jina AI
+https://jina.ai/embeddings/
+
+## API Key
+```python
+# env variable
+os.environ['JINA_AI_API_KEY']
+```
+
+## Sample Usage - Embedding
+```python
+from litellm import embedding
+import os
+
+os.environ['JINA_AI_API_KEY'] = ""
+response = embedding(
+    model="jina_ai/jina-embeddings-v3",
+    input=["good morning from litellm"],
+)
+print(response)
+```
+
+## Supported Models
+All models listed here https://jina.ai/embeddings/ are supported