fix(docs): Fix indentation in `vault-pushsecret.yaml` (#3156)

Signed-off-by: Maxence Boutet <52334444+mboutet@users.noreply.github.com>

docs/snippets/vault-pushsecret.yaml

@@ -22,11 +22,11 @@ spec:
       name: source-secret
   data:
     - match:
-      secretKey: source-key1
-      remoteRef:
-        remoteKey: vault/secret1
+        secretKey: source-key1
+        remoteRef:
+          remoteKey: vault/secret1
     - match:
-      secretKey: source-key2
-      remoteRef:
-        remoteKey: vault/secret2
-        property: foo
+        secretKey: source-key2
+        remoteRef:
+          remoteKey: vault/secret2
+          property: foo