message: gdb attaching to process during tests has non-sudo solution
diff: @@ -175,7 +175,8 @@ cat /tmp/user/1000/testo9vsdjo3/node1/regtest/bitcoind.pid
  gdb /home/example/bitcoind <pid>
  ```
  -Note: gdb attach step may require `sudo`
  +Note: gdb attach step may require ptrace_scope to be modified, or `sudo` preceding the `gdb`.
  +See this link for considerations: https://www.kernel.org/doc/Documentation/security/Yama.txt
  ### Util tests
  