Update docs link to cluster annotations

[addyess]

Overview

• rehome the link to the annotations reference guide

[bschimke95]

LGTM

[github-actions]

Test coverage for 6d3a4f9

coverage-report: install_deps /home/runner/work/k8s-operator/k8s-operator/charms/worker/k8s> /home/runner/.local/share/uv/tools/tox/bin/uv pip install 'coverage[toml]'
coverage-report: commands[0] /home/runner/work/k8s-operator/k8s-operator/charms/worker/k8s> coverage report
Name                                    Stmts   Miss  Cover
-----------------------------------------------------------
lib/charms/k8s/v0/k8sd_api_manager.py     286     29    90%
src/charm.py                              509    266    48%
src/cloud_integration.py                   80      3    96%
src/config/extra_args.py                   31      2    94%
src/containerd.py                         140     22    84%
src/cos_integration.py                     33     12    64%
src/events/update_status.py                68     24    65%
src/inspector.py                           41      4    90%
src/kube_control.py                        43     32    26%
src/literals.py                            27      0   100%
src/protocols.py                           28      5    82%
src/reschedule.py                          77      4    95%
src/snap.py                               193     29    85%
src/token_distributor.py                  181    109    40%
src/upgrade.py                            108     48    56%
-----------------------------------------------------------
TOTAL                                    1845    589    68%
coverage-report: OK (0.34=setup[0.03]+cmd[0.31] seconds)
congratulations :) (0.40 seconds)

Static code analysis report

Run started:2025-01-24 15:02:41.970536

Test results:
  No issues identified.

Code scanned:
  Total lines of code: 3931
  Total lines skipped (#nosec): 3
  Total potential issues skipped due to specifically being disabled (e.g., #nosec BXXX): 0

Run metrics:
  Total issues (by severity):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
  Total issues (by confidence):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
Files skipped (0):