chore(deps): update dependency go to v1.23.5

| datasource     | package | from   | to     |
| -------------- | ------- | ------ | ------ |
| golang-version | go      | 1.23.4 | 1.23.5 |


Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

go.mod

@@ -2,7 +2,7 @@ module github.com/cloudnative-pg/cnpg-i-machinery
 
 go 1.23.0
 
-toolchain go1.23.4
+toolchain go1.23.5
 
 require (
 	github.com/cloudnative-pg/api v1.25.0