chore: update to slsa-verifier v2.7.0 (#4089)

# Summary

Update to slsa-verifier v2.7.0, followup to 

slsa-framework/slsa-verifier#829


## Testing Process

Pre-submits in this PR pass.

## Checklist

- [x] Review the contributing
[guidelines](https://github.com/slsa-framework/slsa-github-generator/blob/main/CONTRIBUTING.md)
- [x] Add a reference to related issues in the PR description.
- [x] Update documentation if applicable.
- [x] Add unit tests if applicable.
- [x] Add changes to the
[CHANGELOG](https://github.com/slsa-framework/slsa-github-generator/blob/main/CHANGELOG.md)
if applicable.

Signed-off-by: Ramon Petgrave <[email protected]>

Author: ramonpetgrave64

.github/actions/generate-builder/action.yml

@@ -91,8 +91,8 @@ runs:
         # release binaries when the compile-builder input is false.
         VERIFIER_REPOSITORY: slsa-framework/slsa-verifier # The repository to download the pre-built verifier binary from.
         VERIFIER_RELEASE_BINARY: slsa-verifier-linux-amd64 # The name of the verifier binary in the release assets.
-        VERIFIER_RELEASE_BINARY_SHA256: 1c9c0d6a272063f3def6d233fa3372adbaff1f5a3480611a07c744e73246b62d # The expected hash of the verifier binary.
-        VERIFIER_RELEASE: v2.6.0 # The version of the verifier to download.
+        VERIFIER_RELEASE_BINARY_SHA256: 499befb675efcca9001afe6e5156891b91e71f9c07ab120a8943979f85cc82e6 # The expected hash of the verifier binary.
+        VERIFIER_RELEASE: v2.7.0 # The version of the verifier to download.
 
         COMPILE_BUILDER: "${{ inputs.compile-builder }}"
         # NOTE: If a builder reference is specified, then we will download this version of the builder.