docs: fix typos in Sphinx documentation and probe/report strings

[xieyanran]

What changed

Fixes 13 spelling errors across 7 files:

• docs/source/configurable.rst: overriden -> overridden, aggregrated -> aggregated
• docs/source/faster.rst: parallise -> parallelize, taht -> that, form -> from, parallization -> parallelization (heading, underline length adjusted to match)
• docs/source/generators/guardrails.rst: warpping -> wrapping, parallisation -> parallelisation
• docs/source/reporting.calibration.rst: whiile -> while, artifically -> artificially
• docs/source/translation.rst: entires -> entries
• garak/analyze/report_avid.py: Vunerability -> Vulnerability (report description string; the sibling branch two lines below already spells it correctly)
• garak/probes/tap.py: Therefor -> Therefore (module docstring)

Why

Found while reading through the Sphinx docs and a couple of module docstrings; these are plain prose/string typos that don't affect any behavior.

How I checked

• Manually reviewed each change in context to avoid false positives (e.g. left British-English spelling variants like co-ordinate alone, and did not touch the DAN-mode jailbreak prompt text in dan.py, since those "typos" are part of the actual attack payload being tested, not documentation).
• Confirmed no test in tests/ references any of the changed strings (grep -rn for each old string returned nothing).
• Where a fix changed an RST section heading (faster.rst), verified the underline length still matches the new heading length so Sphinx won't warn about a mismatched title underline.