fix(docs): correct spelling and duplicated words across docs

[joedrf]

What

Corrects 29 spelling errors and duplicated words in the docs. 31 unique lines changed;
the file count is large only because each correction is applied to every versioned copy
of the affected page.

reference/

Fix	Page
Conncections → Connections (heading)	reference/architecture.md
unavailble → unavailable (×2)	reference/circuit-breaking.md
minumum → minimum	reference/circuit-breaking.md
crytpographic → cryptographic	reference/proxy-metrics.md
to which which the → to which the	reference/proxy-metrics.md
decribes → describes	reference/authorization-policy.md
precendence → precedence	reference/authorization-policy.md
which authenticate thes → which authenticates the	reference/authorization-policy.md

tasks/

Fix	Page
accross → across, resiliant → resilient	tasks/federated-services.md
dyanmic → dynamic	tasks/configuring-dynamic-request-routing.md
proxy-injnector → proxy-injector, dupliate → duplicate	tasks/troubleshooting.md
tutoral → tutorial, consective → consecutive	tasks/circuit-breakers.md
Instrunctions → Instructions	tasks/install.md, tasks/install-helm.md
recieve → receive, of the the → of the	tasks/traffic-shifting.md
instaneously → instantaneously	tasks/automatically-rotating-control-plane-tls-credentials.md
Uninstallating → Uninstalling	tasks/uninstall.md
such as as the one → such as the one	tasks/grafana.md
they wil be → they will be	tasks/rotating_webhooks_certificates.md
used to to provide → used to provide	tasks/setting-up-service-profiles.md
how to to use → how to use	tasks/generate-certificates.md
meshed with with → meshed with, stray , , → ,	tasks/using-ingress.md

features/

Fix	Page
Kuberentes → Kubernetes	features/automatic-mtls.md
Futher reading → Further reading (heading)	features/dashboard.md
is to to provide → is to provide	features/topology-aware-routing.md

Scope

Each fix is applied to every versioned directory in which the string actually appears
(2-edge, docs, and 2.10–2.19), following the convention in #1961 and #2137.
Reviewing linkerd.io/content/2-edge alone shows all 31 unique changes without the
per-version repetition.

Commits are split by docs area (reference, tasks, features) so they can be taken
independently if preferred.

How these were found

Extracted the visible prose from every page in the sitemap (excluding code blocks and
navigation), ran it through hunspell, then filtered to words that are rare on the site
but one edit away from a word the site uses frequently. Every candidate was re-checked
against the rendered page before being included here, and a few apparent hits were
discarded as false positives (for example as as inside "has as", and a diacovery
that turns out to be inside a verbatim quoted tweet in a blog post).

Notes

• make lint passes; no new markdownlint warnings.
• No content changes beyond spelling and duplicated words. Blog posts are untouched here
  and will follow separately.
• One further typo, Appache Common Log Format, lives in linkerd.io/data/cli/*.yaml,
  which is auto-generated by linkerd doc. It needs fixing in linkerd/linkerd2 instead,
  otherwise it returns on the next regeneration, so it is deliberately not included.

[travisbeckham]

Looks great! Thanks for fixing all of these.