Merge bitcoin#19357: doc: add release note for bitcoin-cli -generate

9886c7d doc: add release note for bitcoin-cli -generate (Jon Atack)

Pull request description:

  Adds a release note for bitcoin#19133.

ACKs for top commit:
  laanwj:
    ACK 9886c7d

Tree-SHA512: 1354e5db0098447788c9ded6f2cd868fd6ea4a1443c99bec8026881b962c92b7257bfea45757769071605faeb989e9db48eaa2fbe9d273513aa2905ee479a8ec

doc/release-notes-19133.md

@@ -0,0 +1,7 @@
+## CLI
+
+A new `bitcoin-cli -generate` command, equivalent to RPC `generatenewaddress`
+followed by `generatetoaddress`, can generate blocks for command line testing
+purposes. This is a client-side version of the
+[former](https://github.com/bitcoin/bitcoin/issues/14299) `generate` RPC. See
+the help for details. (#19133)