Update GH action to use clang-format-12

Author: apaillier-ledger

.github/workflows/lint-workflow.yml

@@ -19,8 +19,8 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Lint
-        uses: DoozyX/clang-format-lint-action@v0.11
+        uses: DoozyX/clang-format-lint-action@v0.13
         with:
           source: "./"
           extensions: "h,c"
-          clangFormatVersion: 10
+          clangFormatVersion: 12.0.0