Update Rust and Crates and GHA (#6843)

- Update Rust to v1.93.1
- Updated all the crates
  Adjust changes needed for the newer `rand` crate
- Updated GitHub Actions

Signed-off-by: BlackDex <black.dex@gmail.com>

src/crypto.rs

@@ -55,13 +55,13 @@ pub fn encode_random_bytes<const N: usize>(e: &Encoding) -> String {
 /// Generates a random string over a specified alphabet.
 pub fn get_random_string(alphabet: &[u8], num_chars: usize) -> String {
     // Ref: https://rust-lang-nursery.github.io/rust-cookbook/algorithms/randomness.html
-    use rand::Rng;
+    use rand::RngExt;
     let mut rng = rand::rng();
 
     (0..num_chars)
         .map(|_| {
             let i = rng.random_range(0..alphabet.len());
-            alphabet[i] as char
+            char::from(alphabet[i])
         })
         .collect()
 }