Merge rust-bitcoin#4937: fix: correct function names in deprecation notes

ca94c49 Fix typos in deprecated method names (jrakibi)

Pull request description:

  While reviewing the code to better understand `script::Builder` (issue rust-bitcoin#4917), I noticed we referenced functions in deprecation notes and comments that don't exist
  
  This PR: 
  - Fix deprecation note: `from_hex_string_no_length_prefix()` → `from_hex_no_length_prefix()`
  - Fix comment in script example: `from_hex_string_prefixed` → `from_hex_prefixed`


ACKs for top commit:
  tcharding:
    ACK ca94c49


Tree-SHA512: c2382339780a944e13f3551e2bb9edc06d94f5be45118733fb12d8e61a440760ab5bd824ef956e5092032eb25859cd6cbbb42b3751e8df9475e275adec90e439

Author: apoelstra

bitcoin/examples/script.rs

@@ -51,7 +51,7 @@ fn main() {
     let hex_inherent = script_code.to_hex_string_prefixed(); // Defined in `ScriptExt`.
     println!("hex created using inherent `to_hex_string_prefixed`: {hex_inherent}");
 
-    // The inverse of `to_hex_string_prefixed` is `from_hex_string_prefixed`.
+    // The inverse of `to_hex_string_prefixed` is `from_hex_prefixed`.
     let decoded = WitnessScriptBuf::from_hex_prefixed(&hex_inherent).unwrap(); // Defined in `ScriptBufExt`.
     assert_eq!(decoded, script_code);
     // We can also parse the output of `to_hex_string_prefixed` using `deserialize_hex`.

bitcoin/src/blockdata/script/owned.rs

@@ -105,7 +105,7 @@ internal_macros::define_extension_trait! {
         }
 
         /// Constructs a new [`ScriptBuf`] from a hex string.
-        #[deprecated(since = "TBD", note = "use `from_hex_string_no_length_prefix()` instead")]
+        #[deprecated(since = "TBD", note = "use `from_hex_no_length_prefix()` instead")]
         fn from_hex(s: &str) -> Result<Self, hex::HexToBytesError>
             where Self: Sized
         {