lang(edu): translate k8s manifest comments to English only

- restore-seed-job.yaml.example: translate runbook to English
- secrets.yaml.example: translate section headers to English
- webinar-checker.yaml: translate initContainer dependency-order comments to English

Co-authored-by: assistant

edu_master/k8s/secrets.yaml.example

@@ -5,7 +5,7 @@ metadata:
   namespace: edu-master
 type: Opaque
 stringData:
-  # PHPSESSID keeper
+  # Session keeper credentials
   KEEPER_LOGIN: ""
   KEEPER_PASSWORD: ""
   KEEPER_INTERVAL: "10"
@@ -23,4 +23,5 @@ stringData:
   WEBINAR_CHECK_INTERVAL: "60"
   # Database
   REDIS_HOST: "redis"
-  REDIS_PORT: "6379"
+  REDIS_PORT: "6379"
+  TZ: "Europe/Kyiv"