update upgrade height

upgrade/v3.1.0.md

@@ -1,11 +1,11 @@
 # IRIS Hub Upgrade v3.1.0
 
-## This is a coordinated upgrade. IT IS CONSENSUS BREAKING, so please apply the fix only on height 25351000
+## This is a coordinated upgrade. IT IS CONSENSUS BREAKING, so please apply the fix only on height 25392000
 
 ### Release Details
 
 * <https://github.com/irisnet/irishub/releases/tag/v3.1.0>
-* Chain upgrade height : `25351000`. Exact upgrade time can be checked [here](https://www.mintscan.io/iris/block/25351000).
+* Chain upgrade height : `25392000`. Exact upgrade time can be checked [here](https://www.mintscan.io/iris/block/25392000).
 * Go version has been frozen at `1.21`. If you are going to build `iris` binary from source, make sure you are using the right GO version!
 
 ## Performing the co-ordinated upgrade
@@ -30,7 +30,7 @@ There are two mutually exclusive options for this stage:
 
 ```toml
 # Note: Commitment of state will be attempted on the corresponding block.
-halt-height = 25351000
+halt-height = 25392000
 ```
 
 * restart iris process
@@ -44,7 +44,7 @@ halt-height = 25351000
 * Do not modify `app.toml`. Restart the `iris` process with the flag `--halt-height`:
 
 ```shell
-iris start --halt-height 25351000
+iris start --halt-height 25392000
 ```
 
 * Wait for the upgrade height and confirm that the node has halted