Core: Release the read lock while creating connections inrefresh_connections

Signed-off-by: barshaul <[email protected]>

Author: barshaul

CHANGELOG.md

@@ -78,6 +78,7 @@
 * Node: Add `JSON.DEBUG` command ([#2572](https://github.com/valkey-io/valkey-glide/pull/2572))
 * Node: Add `JSON.NUMINCRBY` and `JSON.NUMMULTBY` command ([#2555](https://github.com/valkey-io/valkey-glide/pull/2555))
 * Core: Improve retry logic and update unmaintained dependencies for Rust lint CI ([#2673](https://github.com/valkey-io/valkey-glide/pull/2643))
+* Core: Release the read lock while creating connections in `refresh_connections` ([#2630](https://github.com/valkey-io/valkey-glide/issues/2630))
 
 #### Breaking Changes