Fix RocksDB test 5: correct ldb put command syntax

The ldb put command requires key and value as separate arguments,
not piped input. Changed from:
  echo "testvalue" | ldb put testkey ...
To:
  ldb put testkey testvalue ...

This fixes the error: 'Failed: <key> and <value> must be specified for the put command'

Author: pareenaverma

.github/workflows/test-rocksdb.yml

@@ -171,8 +171,8 @@ jobs:
           # Use ldb to create and manipulate a database
           cd "$TEST_DIR"
           
-          # Put a key-value pair
-          echo "testvalue" | ldb put testkey --db="$TEST_DIR/testdb" --create_if_missing 2>&1
+          # Put a key-value pair (ldb put requires key and value as separate arguments)
+          ldb put testkey testvalue --db="$TEST_DIR/testdb" --create_if_missing 2>&1
           
           # Get the value back
           RESULT=$(ldb get testkey --db="$TEST_DIR/testdb" 2>&1 || echo "")