fix: actionlint errors on non-existing context in some events (#577)

* fix: default to github.sha when inputs is not defined

* refactor: pin actionlint download to v1.6.15

* fix: ignore actionlint rule

* revert: refactor: pin actionlint download to v1.6.15

* feat: pin actionlint version

.github/workflows/continuous-integration.yml

@@ -47,7 +47,7 @@ jobs:
 
       - name: Download actionlint
         run: |
-          bash <(curl https://raw.githubusercontent.com/rhysd/actionlint/main/scripts/download-actionlint.bash)
+          bash <(curl https://raw.githubusercontent.com/rhysd/actionlint/main/scripts/download-actionlint.bash) 1.6.15
 
       - name: Set up Node.js
         uses: actions/setup-node@17f8bd926464a1afa4c6a11669539e9c1ba77048 # tag=v3.2.0
@@ -63,7 +63,8 @@ jobs:
         # Convert output of stylelint so that the problem matcher can match it correctly.
         run: |
           EXIT_STATUS=0
-          ./actionlint -ignore 'property "app_private_key" is not defined' -ignore 'SC2153:' || EXIT_STATUS=$?
+          ./actionlint -ignore 'property "app_private_key" is not defined' -ignore 'SC2153:' \
+            -ignore 'property "sha" is not defined in object type {}' || EXIT_STATUS=$?
           docker run app yarn lint:hbs || EXIT_STATUS=$?
           docker run app yarn lint:js || EXIT_STATUS=$?
           STYLELINT_OUTPUT="$(docker run app yarn lint:scss)" || EXIT_STATUS=$?