ci: update trigger events (#236)

Author: vladopajic

.github/workflows/action-docker-test.yml

@@ -1,5 +1,7 @@
 name: action-test (docker version)
-on: [push]
+on:
+  pull_request:
+  merge_group:
 jobs:
   build-dev-image:
     name: build dev image

.github/workflows/lint.yml

@@ -1,5 +1,7 @@
 name: lint
-on: [push]
+on:
+  pull_request:
+  merge_group:
 jobs:
   lint:
     name: lint

.github/workflows/test.yml

@@ -1,5 +1,7 @@
 name: test
-on: [push]
+on:
+  pull_request:
+  merge_group:
 permissions:
   contents: write
   pull-requests: write