Fix: Wrong major version in UPGRADE.md for dc_exclusion column (#1080)

Author: VictorCavichioli

docs/UPGRADE.md

@@ -1,10 +1,10 @@
 # Upgrade to 6.1.X
 
 ## Reject Configuration in Datacenter level
-Version 6.0.7 has added support for disabling schedule repairs in a specified list of datacenters. Due to this the `ecchronos.reject_configuration` table
+Version 6.1.X has added support for disabling schedule repairs in a specified list of datacenters. Due to this the `ecchronos.reject_configuration` table
 has gotten a new column `dc_exclusion`.
 
-The `ecchronos.reject_configuration` table must be updated before performing the upgrade to version  6.0.7.
+The `ecchronos.reject_configuration` table must be updated before performing the upgrade to version  6.1.X.
 
 The command to add the column is shown below:
 ```
@@ -169,4 +169,4 @@ This can be configured in `conf/ecc.yml`:
 ```
 cql:
   remoteRouting: false
-```
+```