github-actions: bump codecov/codecov-action from 3.0.0 to 3.1.0

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 3.0.0 to 3.1.0.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/master/CHANGELOG.md)
- [Commits](codecov/codecov-action@e3c5604...81cd2dc)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

.github/workflows/builds.yml

@@ -709,7 +709,7 @@ jobs:
           cd ../libhtp/htp
           gcov-9 -p *.[ch]
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@e3c560433a6cc60aec8812599b7844a7b4fa0d71
+        uses: codecov/codecov-action@81cd2dc8148241f03f5839d295e000b8f761e378
         with:
           fail_ci_if_error: false
           flags: suricata-verify
@@ -784,7 +784,7 @@ jobs:
           cd ../libhtp/htp
           gcov-9 -p *.[ch]
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@e3c560433a6cc60aec8812599b7844a7b4fa0d71
+        uses: codecov/codecov-action@81cd2dc8148241f03f5839d295e000b8f761e378
         with:
           fail_ci_if_error: false
           flags: unittests
@@ -863,7 +863,7 @@ jobs:
           cd src
           llvm-cov-10 gcov -p *.c
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@e3c560433a6cc60aec8812599b7844a7b4fa0d71
+        uses: codecov/codecov-action@81cd2dc8148241f03f5839d295e000b8f761e378
         with:
           fail_ci_if_error: false
           flags: fuzzcorpus