chore: Avoid to run tests and linter with stable and beta for nightly branches

That branches potentially use features that are not in stable or beta yet

Author: jhg

.github/workflows/test.yml

@@ -33,7 +33,7 @@ jobs:
         rust: [ stable, beta ]
     runs-on: ${{ matrix.os }}
     timeout-minutes: 5
-    if: github.event_name != 'schedule' && github.event_name != 'workflow_dispatch'
+    if: github.event_name != 'schedule' && github.event_name != 'workflow_dispatch' && !endsWith(github.ref, '-nightly')
     steps:
     - uses: actions/checkout@v2
     - uses: actions-rs/toolchain@v1
@@ -49,7 +49,7 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     timeout-minutes: 5
-    if: github.event_name != 'schedule' && github.event_name != 'workflow_dispatch' && !contains(github.ref, 'refs/tags/v')
+    if: github.event_name != 'schedule' && github.event_name != 'workflow_dispatch' && !endsWith(github.ref, '-nightly') && !contains(github.ref, 'refs/tags/v')
     steps:
     - uses: actions/checkout@v2
     - uses: actions-rs/toolchain@v1