Bumps [actions/checkout](https://github.com/actions/checkout) from 6 to 7.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v6...v7)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

…dabot/github_actions/actions/checkout-7

Bump actions/checkout from 6 to 7

Bumps [arduino/arduino-lint-action](https://github.com/arduino/arduino-lint-action) from 2 to 3.
- [Release notes](https://github.com/arduino/arduino-lint-action/releases)
- [Commits](arduino/arduino-lint-action@v2...v3)

---
updated-dependencies:
- dependency-name: arduino/arduino-lint-action
  dependency-version: '3'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

…dabot/github_actions/arduino/arduino-lint-action-3

Bump arduino/arduino-lint-action from 2 to 3

Use sizeof(iTxBuffer) instead of sizeof(iTxSize) when computing the
remaining space, preventing truncated writes and potential memcpy overflow.

Multiple read() calls in one expression have unspecified evaluation order
in C++, so the length bytes could be combined wrong. Read each byte into
its own variable before combining them.

Default iRxSize to the inline length and only override it for the 126/127
extended-length cases. No behavioural change.

Only 2 header bytes were guaranteed before reading the extended length and
mask, so a partial header made read() return -1 and corrupt iRxSize. Bail
out until all header bytes have arrived.

WebSocketClient: check extended length/mask bytes are available

Fix typo in WebSocketClient::write buffer size clamp