doc: fix conan version in DEVELOPMENT.md (milvus-io#31414)

The conan version used in all the setup scripts was updated to `1.61.0`
in milvus-io#27870. However, a line in
the developer documentation was left out.

Since the dependencies no longer install correctly with conan `1.58`
(milvus-io#27869), all documentation
should consistently use the updated version.

Signed-off-by: Ashwin Krishna Kumar <ashwin.kumar6@ibm.com>

Author: ashkrisk

DEVELOPMENT.md

@@ -131,7 +131,7 @@ Install Conan
 pip install conan==1.61.0
 ```
 
-Note: Conan version 2.x is not currently supported, please use version 1.58.
+Note: Conan version 2.x is not currently supported, please use version 1.61.
 
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