fix(tests): correct indentation in assertion for encryption verification

Author: dheeraj1010

src/test/java/com/thealgorithms/ciphers/PermutationCipherTest.java

@@ -246,7 +246,7 @@ void testSpecificExampleFromDescription() {
         // then
         // Block 1: "HEL" -> positions {3,1,2} -> "LHE"
         // Block 2: "LOX" -> positions {3,1,2} -> "XLO"
-    assertEquals("LHEXLO", encrypted);
+        assertEquals("LHEXLO", encrypted);
         // Verify decryption
         String decrypted = cipher.decrypt(encrypted, key);
         assertEquals("HELLO", decrypted);