Signed-off-by: TJ Hoplock <t.hoplock@gmail.com>

docs: mention new promslog package in package list in README

* Bump golang.org/x/oauth2 from 0.21.0 to 0.22.0

Bumps [golang.org/x/oauth2](https://github.com/golang/oauth2) from 0.21.0 to 0.22.0.
- [Commits](golang/oauth2@v0.21.0...v0.22.0)

---
updated-dependencies:
- dependency-name: golang.org/x/oauth2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

* Go mod tidy in sigv4.

Signed-off-by: SuperQ <superq@gmail.com>

---------

Signed-off-by: dependabot[bot] <support@github.com>
Signed-off-by: SuperQ <superq@gmail.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: SuperQ <superq@gmail.com>

Signed-off-by: Ben Kochie <superq@gmail.com>

This commit removes the check for the existence of the secret file for
headers in the `Validate` function. The check is not valid for relative
paths since `Validate` is called before `SetDirectory`, which is
responsible for setting up the environment. This change aligns with the
handling of other secret files, which are not checked during config
validation.

Signed-off-by: Julien <roidelapluie@o11y.eu>

Signed-off-by: Julien <roidelapluie@o11y.eu>

Remove secret file existence check in Validate for headers