fix(ci): address clippy issue

[agilarity]

Addresses #2272

Changes

• Pin nightly to a version that resolves the clippy issue.
• Do not lint the dependencies of example crates

Notes

• I have not found a way to skip dependency linting with cargo hack
• Pinning nightly also suports the cargo-semver-checks Rust version recommendation.

Unsuccessful Checks

• CI / CI (leptos) - Cancelled

• CI / CI (leptos_reactive) - Cancelled

• CI / CI (server_fn) - No ci output this time. Ran out of space in the previous run.

• CI Examples / CI (examples/counter_isomorphic) - Compile Error

• CI Examples / CI (examples/server_fns_axum) - Compile Error

• CI Examples / CI (examples/todo_app_sqlite_axum) - Internal Error in server_fn

Feature: Delete Todo
  Scenario: Should not see the deleted todo
    > Given I see the app
   ✔> Given I see the app
      Given I add a todo as Buy Yogurt
thread '<unnamed>' panicked at /home/joseph/gh/leptos/server_fn/src/request/mod.rs:128:9:
internal error: entered unreachable code

• CI Examples / CI (examples/todo_app_sqlite_csr) - Internal Error in server_fn

Feature: Delete Todo
  Scenario: Should not see the deleted todo
   ✔> Given I see the app
      Given I add a todo as Buy Yogurt
thread '<unnamed>' panicked at /home/joseph/gh/leptos/server_fn/src/request/mod.rs:128:9:
internal error: entered unreachable code

[gbj]

Okay, thank you very much! This gets things back into a sane place, and I can work to address the unsuccessful checks you list.