docs: add reference to jina rerank module (#11507)

docs/examples/node_postprocessor/JinaRerank.ipynb

@@ -5,7 +5,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<a href=\"https://colab.research.google.com/github/run-llama/llama_index/blob/main/docs/examples/node_postprocessor/CohereRerank.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
+    "<a href=\"https://colab.research.google.com/github/run-llama/llama_index/blob/main/docs/examples/node_postprocessor/JinaRerank.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
    ]
   },
   {

docs/module_guides/querying/node_postprocessors/node_postprocessors.md

@@ -127,6 +127,22 @@ postprocessor.postprocess_nodes(nodes)
 
 Full notebook guide is available [her for Gatsby](/examples/node_postprocessor/LLMReranker-Gatsby.ipynb) and [here for Lyft 10K documents](/examples/node_postprocessor/LLMReranker-Lyft-10k.ipynb).
 
+## JinaRerank
+
+Uses the "Cohere ReRank" functionality to re-order nodes, and returns the top N nodes.
+
+```python
+from llama_index.postprocessor.jinaai_rerank import JinaRerank
+
+postprocessor = JinaRerank(
+    top_n=2, model="jina-reranker-v1-base-en", api_key="YOUR JINA API KEY"
+)
+
+postprocessor.postprocess_nodes(nodes)
+```
+
+Full notebook guide is available [here](/examples/node_postprocessor/JinaRerank.ipynb).
+
 ## FixedRecencyPostprocessor
 
 This postproccesor returns the top K nodes sorted by date. This assumes there is a `date` field to parse in the metadata of each node.