update yaml lint config

.github/dependabot.yml → .github/dependabot.yaml

@@ -12,4 +12,4 @@ updates:
     groups:
       python-packages:
         patterns:
-          - "*"
+          - "*"

.yamllint.yaml

@@ -0,0 +1,9 @@
+extends: default
+
+# Disable checks for truthy values since yamllint reports errors on "on" keywords in GitHub Actions
+# configuration files (since in YAML 1.1 "on" is a boolean). We can remove this once yamllint
+# defaults to YAML 1.2 or provides options to specify that.
+truthy: disable
+
+# This requires all YAML files begin with "---", which in practice is rarely needed.
+document-start: disable