Merge pull request #10 from LuisLiraC/fix/docs

fix example and ad warning to README

Author: LuisLiraC

.github/workflows/example.yaml

@@ -3,7 +3,7 @@ name: Git Diff example
 on:
   push:
     branches:
-      - example/*
+      - example-*
 
 jobs:
   check_diff:

README.md

@@ -54,3 +54,6 @@ jobs:
         echo "Files: ${{ steps.diff.outputs.DIFF_FILES }}"
         echo "Count: ${{ steps.diff.outputs.DIFF_COUNT }}"
 ```
+
+> [!WARNING]
+> At this moment the action does not support branches with `/` in the name. For example, `feature/branch` will not work.