Bump actions/checkout from 3 to 4

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/build-test.yml

@@ -17,7 +17,7 @@ jobs:
   build-test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-go@v4
         with:
           go-version: '1.19.x'

.github/workflows/generate.yml

@@ -17,7 +17,7 @@ jobs:
     if: ${{ github.event.pull_request.head.repo.full_name == github.repository }}
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           ref: ${{ github.event.pull_request.head.ref }}
       - uses: actions/setup-go@v4

.github/workflows/make-release.yml

@@ -8,7 +8,7 @@ jobs:
     name: make release
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-go@v4
         with:
           go-version: '1.19.x'

.github/workflows/update-spec-for-docs.yml

@@ -15,7 +15,7 @@ jobs:
     name: update-spec
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-go@v4
         with:
           go-version: '1.19.x'
@@ -35,7 +35,7 @@ jobs:
             echo "No files changed, proceeding";
           fi
       # Checkout the docs repo since we will want to update the files there.
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           repository: 'kittycad/website'
           path: 'website'