Merge bitcoin/bitcoin#30982: docs: Add instructions on how to self-sign bitcoin-core binaries for macOS

27709f51ee docs: Add instructions on how to self-sign bitcoin-core binaries for macOS (Chris Stewart)

Pull request description:

  Related to #15774

  This PR adds instructions to the release notes to tell users how to self sign bitcoin core binaries so they are executable on macOS.

  Tested on
  ```
  Darwin Chriss-MacBook-Pro.local 23.6.0 Darwin Kernel Version 23.6.0: Mon Jul 29 21:14:46 PDT 2024; root:xnu-10063.141.2~1/RELEASE_ARM64_T6031 arm64
  ```

  These commands do not appear to require 'phoning home'. I tested these commands when disconnected from a network connection and things worked.

ACKs for top commit:
  andrewtoth:
    reACK 27709f51ee
  achow101:
    ACK 27709f51ee

Tree-SHA512: db19c61577bb774420a2506d3f06bc0193116117f09ebd2d022a4524e8ca32d2cf9277a2997744ddfe8844600a569176e194aafc252dd31b48fc6e74db3c74d0

doc/release-notes-empty-template.md

@@ -32,6 +32,13 @@ Upgrading directly from a version of Bitcoin Core that has reached its EOL is
 possible, but it might take some time if the data directory needs to be migrated. Old
 wallet versions of Bitcoin Core are generally supported.
 
+Running Bitcoin Core binaries on macOS requires self signing.
+```
+cd /path/to/bitcoin-core/bin
+xattr -d com.apple.quarantine bitcoin-cli bitcoin-qt bitcoin-tx bitcoin-util bitcoin-wallet bitcoind test_bitcoin
+codesign -s - bitcoin-cli bitcoin-qt bitcoin-tx bitcoin-util bitcoin-wallet bitcoind test_bitcoin
+```
+
 Compatibility
 ==============