build(deps): bump actions/checkout from 2 to 3 (#29276)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 3.
- [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...a12a3943b4bdde767164f792f33f40b04645d846)

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

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/macos_python.yml

@@ -24,7 +24,7 @@ jobs:
     name: gcc with clang
     runs-on: macos-latest
     steps:
-    - uses: actions/checkout@ec3a7ce113134d7a93b817d10a8272cb61118579 # @v2
+    - uses: actions/checkout@a12a3943b4bdde767164f792f33f40b04645d846 # @v2
     - uses: actions/setup-python@f38219332975fe8f9c04cca981d674bf22aea1d3 # @v2
       with:
         python-version: 3.9
@@ -39,7 +39,7 @@ jobs:
     runs-on: macos-latest
     timeout-minutes: 700
     steps:
-    - uses: actions/checkout@ec3a7ce113134d7a93b817d10a8272cb61118579 # @v2
+    - uses: actions/checkout@a12a3943b4bdde767164f792f33f40b04645d846 # @v2
     - uses: actions/setup-python@f38219332975fe8f9c04cca981d674bf22aea1d3 # @v2
       with:
         python-version: 3.9
@@ -52,7 +52,7 @@ jobs:
     name: scipy, mpl, pd
     runs-on: macos-latest
     steps:
-    - uses: actions/checkout@ec3a7ce113134d7a93b817d10a8272cb61118579 # @v2
+    - uses: actions/checkout@a12a3943b4bdde767164f792f33f40b04645d846 # @v2
     - uses: actions/setup-python@f38219332975fe8f9c04cca981d674bf22aea1d3 # @v2
       with:
         python-version: 3.9