Dependabot GitHub Actions (#5640)

* chore: Included githubactions in the dependabot config

This should help with keeping the GitHub actions updated on new releases. This will also help with keeping it secure.

Dependabot helps in keeping the supply chain secure https://docs.github.com/en/code-security/dependabot

GitHub actions up to date https://docs.github.com/en/code-security/dependabot/working-with-dependabot/keeping-your-actions-up-to-date-with-dependabot

https://github.com/ossf/scorecard/blob/main/docs/checks.md#dependency-update-tool
Signed-off-by: naveensrinivasan <172697+naveensrinivasan@users.noreply.github.com>

* floats need approximate math

Co-authored-by: naveensrinivasan <172697+naveensrinivasan@users.noreply.github.com>

.github/dependabot.yml

@@ -11,3 +11,8 @@ updates:
     versions:
     - ">= 0.0.a"
     - "< 0.1"
+- package-ecosystem: "github-actions"
+  directory: "/"
+  schedule: 
+   interval: daily
+  open-pull-requests-limit: 10

tests/training/learning_rate_schedulers/cosine_test.py

@@ -130,7 +130,7 @@ def test_schedules(self):
                 lrs.append(optimizer.param_groups[0]["lr"])
 
             for it, lr in lr_checks:
-                assert lrs[it] == lr, f"Iteration {it}: {lrs[it]} != {lr}"
+                assert lrs[it] == pytest.approx(lr), f"Iteration {it}: {lrs[it]} != {lr}"
 
     def test_schedules_with_save_and_resume(self):
         """Make sure scheduler will resume with the right state."""
@@ -171,4 +171,4 @@ def init_and_restore_scheduler(
                 state = scheduler.state_dict()
 
             for it, lr in lr_checks:
-                assert lrs[it] == lr, f"Iteration {it}: {lrs[it]} != {lr}"
+                assert lrs[it] == pytest.approx(lr), f"Iteration {it}: {lrs[it]} != {lr}"