docs/ISD-3479: Fixing vale errors

[DeeKay3]

Applicable ticket: ISD-3479

Overview

Proposed documentation changes are to fix vale errors.

Rationale

Vale is giving out errors and we are trying to make every documentation compliant with it.

Juju Events Changes

Module Changes

Library Changes

Checklist

• The charm style guide was applied
• The contributing guide was applied
• The changes are compliant with ISD054 - Managing Charm Complexity
• The documentation for charmhub is updated.
• The PR is tagged with appropriate label (urgent, trivial, complex)
• The docs/changelog is updated.

[erinecon]

Looks good, thanks!

[github-actions]

Test results for commit 659cd39

Test coverage for 659cd39

Name              Stmts   Miss Branch BrPart  Cover   Missing
-------------------------------------------------------------
src/agent.py         60      0     12      0   100%
src/charm.py         57      0     10      0   100%
src/metadata.py       8      0      0      0   100%
src/pebble.py        23      0      0      0   100%
src/server.py        50      0     12      0   100%
src/state.py         66      1     10      1    97%   99
-------------------------------------------------------------
TOTAL               264      1     44      1    99%

Static code analysis report

Run started:2025-07-11 15:01:09.029109

Test results:
  No issues identified.

Code scanned:
  Total lines of code: 1667
  Total lines skipped (#nosec): 1
  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):