Make Github ignore Matlab (*.m) files for detecting programming language. (#14)

Solution from https://dev.to/katkelly/changing-your-repo-s-language-in-github-5gjo

Author: abhyshr

.gitattributes

@@ -0,0 +1 @@
+*.m linguist-detectable=false

.github/workflows/pre_commit.yaml

@@ -1,11 +1,23 @@
 name: pre-commit
 
-on: [push]
+# Won't run on develop/main directly
+on: [pull_request]
 
 jobs:
   pre-commit:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3
+      with:
+        ref: ${{ github.event.pull_request.head.ref }}
     - uses: actions/setup-python@v3
     - uses: pre-commit/[email protected]
+    - uses: EndBug/[email protected]
+      # Only need to try and commit if the action failed
+      if: failure()
+      with:
+        fetch: false
+        committer_name: GitHub Actions
+        committer_email: [email protected]
+        message: Apply pre-commmit fixes 
+