☑️ Golang solution
Code
# Code
```golang []
func makeSmallestPalindrome(s string) string {

    output := []byte(s)
	for i, j := 0, len(s)-1; i <= j; i, j = i+1, j-1 {
        if s[i] == s[j] {
			continue
		}
		output[i] = min(s[i], s[j])
		output[j] = output[i]
	}

	return string(output)
}
```
['Go']