Make use of Map factory method

Fixes #7

Author: purejava

src/main/java/org/cryptomator/linux/keychain/SecretServiceKeychainAccess.java

@@ -76,8 +76,6 @@ public void changePassphrase(String key, CharSequence passphrase) throws Keychai
 	}
 
 	private Map<String, String> createAttributes(String key) {
-		Map<String, String> attributes = new HashMap();
-		attributes.put("Vault", key);
-		return attributes;
+		return Map.of("Vault", key);
 	}
 }