chore(deps): bump actions/checkout from 2 to 2.3.4

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 2.3.4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v2...v2.3.4)

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/build.yml

@@ -79,7 +79,7 @@ jobs:
             skip-archive: true
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
       - name: Cache west modules
         uses: actions/cache@v2
         env:

.github/workflows/clang-format-lint.yml

@@ -22,7 +22,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
       - uses: DoozyX/clang-format-lint-action@v0.11
         with:
           source: "./app"

.github/workflows/doc-checks.yml

@@ -14,7 +14,7 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
       - uses: bahmutov/npm-install@v1
         with:
           working-directory: docs
@@ -24,7 +24,7 @@ jobs:
   prettier:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
       - uses: bahmutov/npm-install@v1
         with:
           working-directory: docs

.github/workflows/test.yml

@@ -19,7 +19,7 @@ jobs:
       image: zmkfirmware/zmk-build-arm:2.4
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
       - name: Cache west modules
         uses: actions/cache@v2
         env: