Merge bitcoin/bitcoin#29567: doc: fix broken reference to CI setup in test/lint/README.md

53ffd5a docs: Fix broken reference to CI setup in test/lint/README.md (naiyoma)

Pull request description:

  The current [reference](https://github.com/bitcoin/bitcoin/blob/master/test/ci/lint/04_install.sh
  ) for CI setup in /test/lint#readme returns a 404.

ACKs for top commit:
  fanquake:
    ACK 53ffd5a

Tree-SHA512: 813c19a145f09e7da11963598b70dc438acba784eb722e509d6af59dc3af8f5da97628c454bed2b03cc919689603e070796de2db8d784d9162ae34e7b85a77d9

Author: fanquake

test/lint/README.md

@@ -34,7 +34,7 @@ To run all the lint checks in the test runner outside the docker, use:
 | [`lint-shell.py`](lint/lint-shell.py) | [ShellCheck](https://github.com/koalaman/shellcheck)
 | [`lint-spelling.py`](lint/lint-spelling.py) | [codespell](https://github.com/codespell-project/codespell)
 
-In use versions and install instructions are available in the [CI setup](../ci/lint/04_install.sh).
+In use versions and install instructions are available in the [CI setup](../../ci/lint/04_install.sh).
 
 Please be aware that on Linux distributions all dependencies are usually available as packages, but could be outdated.