with the release of rust 1.67, let's bump to 1.66.1 (#7866)

# Description

This PR bumps the required rust version to 1.66.1.

# User-Facing Changes


# Tests + Formatting

Don't forget to add tests that cover your changes.

Make sure you've run and fixed any issues with these commands:

- `cargo fmt --all -- --check` to check standard code formatting (`cargo
fmt --all` applies these changes)
- `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used -A
clippy::needless_collect` to check that you're using the standard code
style
- `cargo test --workspace` to check that all tests pass

# After Submitting

If your PR had any user-facing changes, update [the
documentation](https://github.com/nushell/nushell.github.io) after the
PR is merged, if necessary. This will help us keep the docs up to date.

crates/nu-command/src/dataframe/eager/get.rs

@@ -67,7 +67,7 @@ fn command(
     let df = NuDataFrame::try_from_pipeline(input, call.head)?;
 
     df.as_ref()
-        .select(&col_string)
+        .select(col_string)
         .map_err(|e| {
             ShellError::GenericError(
                 "Error selecting columns".into(),

crates/nu-command/src/dataframe/values/nu_dataframe/conversion.rs

@@ -307,10 +307,7 @@ pub fn create_column(
                 .skip(from_row)
                 .take(size)
                 .map(|v| match v {
-                    Some(a) => Value::Int {
-                        val: a as i64,
-                        span,
-                    },
+                    Some(a) => Value::Int { val: a, span },
                     None => Value::Nothing { span },
                 })
                 .collect::<Vec<Value>>();