fix: add workflows to main push (XRPLF#315)

## High Level Overview of Change

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Please include a summary/list of the changes.
If too broad, please consider splitting into multiple PRs.
If a relevant Asana task, please link it here.
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Currently unit_test, build_and_lint, quality_checks are not executed on
main branch after a PR is merged. This PR would fix this issue.

### Type of Change

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Please check relevant options, delete irrelevant ones.
-->

- [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 not work as expected)
- [ ] Refactor (non-breaking change that only restructures code)
- [ ] Tests (You added tests for code that already exists, or your new
feature included in this PR)
- [ ] Documentation Updates
- [ ] Release

Author: pdp2121

.github/workflows/build_and_lint.yml

@@ -1,7 +1,7 @@
 on:
   push:
     branches:
-      - dev
+      - main
   pull_request:
     branches:
       - main

.github/workflows/integration_test.yml

@@ -2,7 +2,6 @@ on:
   push:
     branches:
       - main
-      - dev
   pull_request:
     branches:
       - main

.github/workflows/quality_test.yml

@@ -1,13 +1,13 @@
 on:
   push:
     branches:
-      - dev
+      - main
   pull_request:
     branches:
       - main
       - dev
   schedule:
-    - cron: '0 0 * * *'
+    - cron: "0 0 * * *"
 
 name: Quality Check
 

.github/workflows/unit_test.yml

@@ -1,7 +1,7 @@
 on:
   push:
     branches:
-      - dev
+      - main
   pull_request:
     branches:
       - main