fix: warnings

.github/actions/rust/action.yml

@@ -1,3 +1,5 @@
+---  # Common CI steps
+
 name: "Rust"
 description: |
   Common steps for CI

.github/labeler.yml

@@ -1,3 +1,5 @@
+---  # Github labeler configuration file
+
 # Add 'crate: mpt_trie' label to any changes within 'mpt_trie' folder.
 'crate: mpt_trie':
   - changed-files:

.github/workflows/labeler.yml

@@ -1,4 +1,4 @@
----   # Add labels to the PR
+---  # Add labels to the PR
 
 name: "Pull Request Labeler"
 on:

.github/workflows/yamllint.yml

@@ -1,3 +1,5 @@
+---  # Run yamllint on all YAML files in the repository
+
 name: Yamllint
 'on':
   pull_request:
@@ -20,5 +22,5 @@ jobs:
         run: >
           yamllint
           --format github
-          -d "{extends: default, rules: {line-length: {max: 120}}}"
+          -d "{extends: default, rules: {line-length: {max: 120}, truthy: {check-keys: false}}}"
           .github