Add RedisInsight v1.11 release notes (#1605)

* Add RI v1.11 release notes

* Add notes about redisearch fix and graph fix

content/ri/release-notes/v1.11.0.md

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+---
+Title: RedisInsight v1.11, Oct 2021
+linkTitle: v1.11 (Oct 2021)
+date: 2021-10-17 00:00:00 +0000
+description: RedisInsight v1.11.0
+weight: 90
+---
+
+This is the General Availability Release of RedisInsight 1.11 (v1.11.0)!
+
+### 1.11.0
+
+### Headlines:
+- Added beta support for [RedisAI](https://oss.redis.com/redisai/)
+- Fixed the issue with empty fields for Hash objects.
+
+### Full Details:
+- Core:
+  - Fixed a bug where editing cluster returns error.
+  - Fixed broken redis links.
+- Browser
+  - Check Hash value for `emptiness`
+- RedisGraph:
+  - Added support for point datatype.
+  - Fixed a bug where returning relationships without their respective nodes leads to infinite loading
+- RediSearch:
+  - Fixed a bug where a malformed unicode string in redisearch doesn't produce results.
+- RedisTimeseries:
+  - Added support for `TS.REVRANGE` and `TS.MREVRANGE` commands.