Release notes for marqo 1.1.0 (#558)

Add release notes for marqo 1.1.0

RELEASE.md

@@ -1,3 +1,25 @@
+# Release 1.1.0
+
+## New features
+
+- New field `numberOfVectors` in the `get_stats` response object (https://github.com/marqo-ai/marqo/pull/553). 
+This field counts all vectors from all documents in a given index. See [here](https://docs.marqo.ai/1.1.0/API-Reference/stats/) for detailed usage.
+
+- New per-index health check endpoint `GET /indexes/{index-name}/health` (https://github.com/marqo-ai/marqo/pull/552). 
+This replaces the cluster-level health check endpoint, `GET /health`,
+which is deprecated and will be removed in Marqo 2.0.0. See [here](https://docs.marqo.ai/1.1.0/API-Reference/health/) for detailed usage.
+
+## Bug fixes and minor changes
+
+- Improved image download validation and resource management (https://github.com/marqo-ai/marqo/pull/551). Image downloading in Marqo is more stable and resource-efficient now.
+
+- Adding documents now returns an error when `tensorFields` is not specified explicitly (https://github.com/marqo-ai/marqo/pull/554). This prevents users accidentally creating unwanted tensor fields.
+
+## Contributor shout-outs
+
+- Thank you for the vibrant discussion in our [forum](https://community.marqo.ai/). We love hearing your questions and about your use cases.
+
+
 # Release 1.0.0
 
 ## Breaking Changes