Remove note about fixed cargo bug

[bugadani]

rust-lang/cargo#10358 has been fixed, we probably no longer want to call it out.

The fix will be part of 1.86, so we can delay merging the PR until that, if important.

[MabezDev]

Should we also remove the work around we did in esp-config?

[bjoernQ]

I was too slow .... yes should we remove it:

esp-hal/esp-config/src/generate.rs

Lines 374 to 409 in 477e1d6

	// A work-around for https://github.com/rust-lang/cargo/issues/10358
	// This can be removed when https://github.com/rust-lang/cargo/pull/14058 is merged.
	// Unlikely to work on projects in workspaces
	#[cfg(not(test))]
	fn env_change_work_around<W: Write>(stdout: &mut W) {
	let mut out_dir = PathBuf::from(env::var_os("OUT_DIR").unwrap());
	// We clean out_dir by removing all trailing directories, until it ends with
	// target
	while !out_dir.ends_with("target") {
	if !out_dir.pop() {
	return; // We ran out of directories...
	}
	}
	out_dir.pop();
	let dotcargo = out_dir.join(".cargo/");
	if dotcargo.exists() {
	if dotcargo.join("config.toml").exists() {
	writeln!(
	stdout,
	"cargo:rerun-if-changed={}",
	dotcargo.join("config.toml").display()
	)
	.ok();
	}
	if dotcargo.join("config").exists() {
	writeln!(
	stdout,
	"cargo:rerun-if-changed={}",
	dotcargo.join("config").display()
	)
	.ok();
	}
	}
	}

Wouldn't hurt to keep it however