Merge #363: chore: Update example links in README

c5e8e84 chore: Update example links in README (Randall Naar)

Pull request description:

  Updated the broken example links in the README.

ACKs for top commit:
  luisschwab:
    ACK c5e8e84
  notmandatory:
    ACK c5e8e84

Tree-SHA512: 68accbf8a0c4ca9cc408d72a5915b23512a3792d2c05954f5120ef24c76b9c8b755dc951f8dd8000738cc3e2f23cac3f6ae872f91a513bc1f4e755c2f275b141

Author: notmandatory

README.md

@@ -61,10 +61,10 @@ that the `Wallet` can use to update its view of the chain.
 
 **Examples**
 
-* [`examples/esplora_async`](https://github.com/bitcoindevkit/bdk_wallet/tree/master/examples/esplora_async)
-* [`examples/esplora_blocking`](https://github.com/bitcoindevkit/bdk_wallet/tree/master/examples/esplora_blocking)
-* [`examples/electrum`](https://github.com/bitcoindevkit/bdk_wallet/tree/master/examples/electrum)
-* [`examples/bitcoind_rpc`](https://github.com/bitcoindevkit/bdk_wallet/tree/master/examples/bitcoind_rpc)
+* [`examples/esplora_async`](https://github.com/bitcoindevkit/bdk_wallet/blob/master/examples/esplora_async.rs)
+* [`examples/esplora_blocking`](https://github.com/bitcoindevkit/bdk_wallet/blob/master/examples/esplora_blocking.rs)
+* [`examples/electrum`](https://github.com/bitcoindevkit/bdk_wallet/blob/master/examples/electrum.rs)
+* [`examples/bitcoind_rpc`](https://github.com/bitcoindevkit/bdk_wallet/blob/master/examples/bitcoind_rpc.rs)
 
 ## Persistence