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<!-- Describe the issue -->

**Expected behavior**

When I make a json-rpc call to `getblock` with:

```json
{
    "jsonrpc": "1.0",
    "id": "curltest",
    "method": "getblock",
    "params": ["37351c7060ec3a149af1bbc9ebcc436c0ee652f96559ef1fe9bc45d11000f061", "2"]
}
```
An error should be returned with the [expected data type](https://developer.bitcoin.org/reference/rpc/getblock.html#argument-2-verbosity)(number) for `verbosity`.
<!--- What behavior did you expect? -->

**Actual behavior**

<!--- What was the actual behavior (provide screenshots if the issue is GUI-related)? -->

Received `"message": "JSON value is not a boolean as expected"` as an error message which is not the [expected data type](number) (https://developer.bitcoin.org/reference/rpc/getblock.html#argument-2-verbosity) for `verbosity`

**To reproduce**

Use this curl on a node

```
curl --location --request POST "127.0.0.1:8332" \
--header "Content-Type: application/json" \
--header "Authorization: Basic YOUR_AUTH" \
--data "{
    \"jsonrpc\": \"1.0\",
    \"id\": \"curltest\",
    \"method\": \"getblock\",
    \"params\": [\"37351c7060ec3a149af1bbc9ebcc436c0ee652f96559ef1fe9bc45d11000f061\", \"2\"]
}"
```

**System information**
* self-compiled

<!-- What version of Bitcoin Core are you using, where did you get it (website, self-compiled, etc)? -->

<!-- What type of machine are you observing the error on (OS/CPU and disk type)? -->

<!-- GUI-related issue? What is your operating system and its version? If Linux, what is your desktop environment and graphical shell? -->

<!-- Any extra information that might be useful in the debugging process. -->
<!--- This is normally the contents of a `debug.log` or `config.log` file. Raw text or a link to a pastebin type site are preferred. -->

{
    return RPCHelpMan{"getblockhash",
                "\nReturns hash of block in best-block-chain at height provided.\n",
                {
                    {"height", RPCArg::Type::NUM, RPCArg::Optional::NO, "The height index"},
                },
                RPCResult{
                    RPCResult::Type::STR_HEX, "", "The block hash"},
                RPCExamples{
                    HelpExampleCli("getblockhash", "1000")
            + HelpExampleRpc("getblockhash", "1000")
                },
        [&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
{
    ChainstateManager& chainman = EnsureAnyChainman(request.context);
    LOCK(cs_main);
    const CChain& active_chain = chainman.ActiveChain();
    int nHeight = request.params[0].get_int();
    if (nHeight < 0 || nHeight > active_chain.Height())
        throw JSONRPCError(RPC_INVALID_PARAMETER, "Block height out of range");
    CBlockIndex* pblockindex = active_chain[nHeight];
    return pblockindex->GetBlockHash().GetHex();
},
    };
}
static RPCHelpMan getblockheader()