style: format code with Gofumpt and Prettier

This commit fixes the style issues introduced in 8f82b96 according to the output
from Gofumpt and Prettier.

Details: #2497

docs/user-guides/read-replica-and-rotator.md

@@ -16,7 +16,6 @@ The read replica is managed with a separate chart from the Vald cluster and is d
 
 1. Edit `values.yaml` like below（Please refer to [deployment](deployment) for other fields.）
 
-
    ```yaml
    agent:
    ngt:
@@ -37,12 +36,10 @@ The read replica is managed with a separate chart from the Vald cluster and is d
 
 1. Deploy vald cluster
 
-
    ```bash
    helm install vald vald/vald --values values.yaml
    ```
 
-
 1. Deploy `vald-readreplica` with the same `values.yaml`
 
    ```bash
@@ -51,13 +48,10 @@ The read replica is managed with a separate chart from the Vald cluster and is d
 
 ### When you deploy vald with `vald-helm-operator`
 
-
 1. Edit `valdrelease.yaml` with the same fields as above
 
-
 1. Deploy vald cluster
 
-
    ```bash
    helm install vald-helm-operator-release vald/vald-helm-operator
    kubectl apply -f valdrelease.yaml