`encrypt` method mentioned in the documentation does not actually work

In the documentation for [`encrypt`](https://docs.juliahub.com/MbedTLS/bf9T0/1.0.2/autodocs/#MbedTLS.encrypt) one possible method to specify the cipher is as a `Cipher` object. However, this throws an error:

```julia
julia> using MbedTLS

julia> secret_key = rand(UInt8, 32);

julia> encrypt(Cipher(CIPHER_AES), secret_key, "message")
ERROR: MethodError: no method matching Cipher(::Cipher)
Closest candidates are:
Cipher() at ~/.julia/packages/MbedTLS/lqmet/src/cipher.jl:93
Cipher(::Union{MbedTLS.CipherID, MbedTLS.CipherKind}) at ~/.julia/packages/MbedTLS/lqmet/src/cipher.jl:182
Cipher(::MbedTLS.CipherInfo) at ~/.julia/packages/MbedTLS/lqmet/src/cipher.jl:166
Stacktrace:
[1] crypt(cipher_info::Cipher, op::MbedTLS.Operation, key::Vector{UInt8}, iv::Nothing, msg::String)
@ MbedTLS ~/.julia/packages/MbedTLS/lqmet/src/cipher.jl:277
[2] encrypt(cipher::Cipher, key::Vector{UInt8}, msg::String, iv::Nothing) (repeats 2 times)
@ MbedTLS ~/.julia/packages/MbedTLS/lqmet/src/cipher.jl:306
[3] top-level scope
@ REPL[6]:1
```

Looking at the source code, it looks like [`encrypt` calls `crypt`](https://github.com/JuliaLang/MbedTLS.jl/blob/master/src/cipher.jl#L306), which [calls the `Cipher` constructor on the `cipher_info` parameter](https://github.com/JuliaLang/MbedTLS.jl/blob/e84f9732360700a0f5baf59a65d5211411cb97fd/src/cipher.jl#L277C4-L277C4), which in this case is already a `Cipher`!

Maybe in the documentation it should say that the cipher can be a `CipherInfo` object instead of a `Cipher` object? This works:

```julia
julia> encrypt(MbedTLS.CipherInfo(CIPHER_AES), secret_key, "message")
16-element Vector{UInt8}:
0xbd
0x5f
0x2b
0x20
0x33
0xa3
0x7e
0x54
0x86
0x03
0x68
0x26
0xa9
0xa2
0xaf
0xa5
```

Start with src/cipher.jl around the encrypt and crypt definitions cited in the report, then compare their accepted argument types with the generated encrypt documentation. Confirm whether the intended correction is to the API or its documentation, and verify the reported CipherInfo example and the documented Cipher example before marking the mismatch resolved.

Written by the indexing model from the issue text.