Fix deprecations in yaml lint workflow

.github/workflows/yamllint.yml

@@ -1,21 +1,35 @@
+# Lint YAML files present in the repository.
+#
+# Currently we only lint semaphore yaml files, to
+# avoid excessive confusion from developers by
+# throwing unnecessary warnings or errors on arbitrary
+# yaml files.
+#
+# If you want to lint other YAML files in this
+# repository, *add a second workflow* and make
+# sure that you're specifying file paths in the
+# on:pull_request section and in the `with:file_or_dir`
+# section of the block itself.
 ---
-    name: Yaml Lint
-    on: [push]  # yamllint disable-line rule:truthy
-    jobs:
-      lintAllTheThings:
-        runs-on: ubuntu-latest
-        steps:
-          - uses: actions/checkout@v3
-          - id: yaml-lint
-            uses: ibiqlik/action-yamllint@v3
-            with:
-              file_or_dir: .semaphore/**/*.yml
-              config_file: .semaphore/.yamllint.yml
-
-          - run: echo ${{ steps.yaml-lint.outputs.logfile }}
-
-          - uses: actions/upload-artifact@v2
-            if: always()
-            with:
-              name: yamllint-logfile
-              path: ${{ steps.yaml-lint.outputs.logfile }}
+name: Yaml Lint
+on:  # yamllint disable-line rule:truthy
+  pull_request:
+    paths:
+      - '.semaphore/**/*.yml'
+      - '.semaphore/**/*.yml.tpl'
+
+jobs:
+  lintSemaphoreYaml:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - id: yaml-lint
+        uses: ibiqlik/action-yamllint@v3
+        with:
+          file_or_dir: .semaphore/**/*.yml .semaphore/**/*.yml.tpl
+          config_file: .semaphore/.yamllint.yml
+      - uses: actions/upload-artifact@v2
+        if: always()
+        with:
+          name: yamllint-logfile
+          path: ${{ steps.yaml-lint.outputs.logfile }}