chore: add options required by latest yamllint version

.yamllint

@@ -15,7 +15,8 @@ rules:
   commas:
     max-spaces-after: -1
     level: error
-  comments: disable
+  comments:
+    min-spaces-from-content: 1 # prettier compatibility
   comments-indentation: disable
   document-start: disable
   empty-lines:
@@ -29,5 +30,8 @@ rules:
   new-line-at-end-of-file: disable
   new-lines:
     type: unix
+  octal-values:
+    forbid-implicit-octal: true    # yamllint defaults to false
+    forbid-explicit-octal: true    # yamllint defaults to false
   trailing-spaces: disable
   truthy: disable