Increment lock value

Currently in one of the rustdoc examples showing lock satisfaction we
use two locks with the same value, this obfuscates which lock is doing
the satisfying and which lock is being satisfied.

Increment the value in one of the locks so it is obvious which lock is
which.

bitcoin/src/blockdata/locktime/absolute.rs

@@ -318,7 +318,7 @@ impl LockTime {
     /// ```rust
     /// # use bitcoin::absolute::{LockTime, LockTime::*};
     /// # let n = LockTime::from_consensus(100);          // n OP_CHECKLOCKTIMEVERIFY
-    /// # let lock_time = LockTime::from_consensus(100);  // nLockTime
+    /// # let lock_time = LockTime::from_consensus(100 + 1);  // nLockTime
     ///
     /// let is_satisfied = match (n, lock_time) {
     ///     (Blocks(n), Blocks(lock_time)) => n <= lock_time,