Super-Linter: Lint modified files only

Following the basic example shown here

https://github.com/github/super-linter#example-connecting-github-action-workflow

.github/workflows/super-linter.yml

@@ -1,4 +1,4 @@
-name: Super Linter
+name: Super-Linter
 
 on: [pull_request]
 
@@ -7,12 +7,19 @@ jobs:
     name: Lint Code Base
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: github/super-linter@v4.9.5
+      - name: Checkout Code
+        uses: actions/checkout@v3
+        with:
+          # Full git history is needed to get a proper list of changed files within `super-linter`
+          fetch-depth: 0
+      - name: Lint Code Base
+        uses: github/super-linter@v4.9.5
         env:
           ERROR_ON_MISSING_EXEC_BIT: true
           VALIDATE_BASH: true
           # VALIDATE_BASH_EXEC: true
           # VALIDATE_EDITORCONFIG: true
           # VALIDATE_SHELL_SHFMT: true
+          DEFAULT_BRANCH: master
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          VALIDATE_ALL_CODEBASE: false