build(deps): bump rhysd/actionlint in /.github/workflows

Bumps rhysd/actionlint from 1.7.4 to 1.7.7.

---
updated-dependencies:
- dependency-name: rhysd/actionlint
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/actionlint.dockerfile

@@ -1,3 +1,3 @@
 # Since dependabot cannot update workflows using docker,
 # we use this indirection since dependabot can update this file.
-FROM rhysd/actionlint:1.7.4@sha256:82244e1db1c60d82c7792180a48dd0bcb838370bb589d53ff132503fc9485868
+FROM rhysd/actionlint:1.7.7@sha256:887a259a5a534f3c4f36cb02dca341673c6089431057242cdc931e9f133147e9