Bump oxsecurity/megalinter from 7.6.0 to 7.8.0

Bumps [oxsecurity/megalinter](https://github.com/oxsecurity/megalinter) from 7.6.0 to 7.8.0.
- [Release notes](https://github.com/oxsecurity/megalinter/releases)
- [Changelog](https://github.com/oxsecurity/megalinter/blob/main/CHANGELOG.md)
- [Commits](oxsecurity/megalinter@5364b81...688bc74)

---
updated-dependencies:
- dependency-name: oxsecurity/megalinter
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

.github/workflows/mega-linter.yml

@@ -48,7 +48,7 @@ jobs:
       # You can override MegaLinter flavor used to have faster performances
       # More info at https://megalinter.io/latest/flavors
       # kics-scan ignore-line
-      - uses: oxsecurity/megalinter/flavors/terraform@5364b811bbe86576d832227be174ebc2aa0f5f49
+      - uses: oxsecurity/megalinter/flavors/terraform@688bc7466d7ab4faa83d614c2e6f9acf42b674dc
         name: MegaLinter
         id: ml
         env: