CIF-2614 - change to nightly schedule

[mhaack]

Description

Change to nightly schedule for CIF Core Components library deployments for aemcomponents.dev, but only if we have changes on the default branch.

For commit check in last 24h see https://stackoverflow.com/questions/63014786/how-to-schedule-a-github-actions-nightly-build-but-run-it-only-when-there-where

Related Issue

CIF-2614

Motivation and Context

Reduce the deploy frequency. At the moment we deploy on every PR merge to master. This is too ofter since it will also trigger for unimportant PRs like renovate dependency fixes.

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] I have signed the Adobe Open Source CLA.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes and the overall coverage did not decrease.
• [ ] All unit tests pass on CircleCi.
• [ ] I ran all tests locally and they pass.

[codecov[bot]]

Codecov Report

Merging #778 (fffd05b) into master (bdd366a) will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #778   +/-   ##
=========================================
  Coverage     89.23%   89.23%           
  Complexity     1763     1763           
=========================================
  Files           311      311           
  Lines          7991     7991           
  Branches       1198     1198           
=========================================
  Hits           7131     7131           
  Misses          624      624           
  Partials        236      236           

Flag	Coverage Δ
integration	57.71% <ø> (ø)
jest	86.29% <ø> (ø)
karma	94.82% <ø> (ø)
unittests	88.54% <ø> (ø)

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