Retitles Bedrock doc to appear in correct alphabetical order in site nav (#5639)

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Fixes #5638. Retitles "Amazon Bedrock" page to "Bedrock" so that the
Integrations section of the left nav is properly sorted in alphabetical
order.

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docs/integrations/bedrock.md

@@ -1,4 +1,4 @@
-# Amazon Bedrock
+# Bedrock
 
 >[Amazon Bedrock](https://aws.amazon.com/bedrock/) is a fully managed service that makes FMs from leading AI startups and Amazon available via an API, so you can choose from a wide range of FMs to find the model that is best suited for your use case.
 

docs/modules/models/llms/integrations/bedrock.ipynb

@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "# Amazon Bedrock"
+    "# Bedrock"
    ]
   },
   {