Fixing another typo in vault doc

docs/_docs/vault.md

@@ -71,7 +71,7 @@ Instead of installing Vault using official Ubuntu packages, installation will be
 
 - Step 6. Create Vault TLS certificate
 
-  In case you have your own domain, a valid TLS certificate signed by [Letsencrypt](https://letsencrypt.org/) can be obtained for Minio server, using [Certbot](https://certbot.eff.org/).
+  In case you have your own domain, a valid TLS certificate signed by [Letsencrypt](https://letsencrypt.org/) can be obtained for Vault server, using [Certbot](https://certbot.eff.org/).
 
   See certbot installation instructions in [CertManager - Letsencrypt Certificates Section](/docs/certmanager/#installing-certbot-ionos). Those instructions indicate how to install certbot using DNS challenge with IONOS DNS provider (my DNS provider). Similar procedures can be followed for other DNS providers.
 
@@ -268,7 +268,7 @@ Instead of installing Vault using official Ubuntu packages, installation will be
 
   {{site.data.alerts.note}}
 
-  VAULT_CACERT variable is only needed if Vault's TLS certifica is signed using custom CA. This will be used by vault client to validate Vault's certificate.
+  VAULT_CACERT variable is only needed if Vault's TLS certificate is signed using custom CA. This will be used by vault client to validate Vault's certificate.
 
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