Bump actions/checkout from 2 to 4

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2...v4)

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

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

.github/workflows/check.yml

@@ -4,7 +4,7 @@ jobs:
   releasebuild:
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - run: sudo apt-get update
       - run: sudo apt-get install -y -qq --no-install-recommends automake autoconf libtool autopoint gettext cython3 libglib2.0-dev python3-dev python-gi-dev libbluetooth-dev
       - run: CYTHONEXEC=cython3 ./autogen.sh
@@ -15,7 +15,7 @@ jobs:
   mesonbuild:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - run: sudo apt-get update
       - run: sudo apt-get install -y -qq --no-install-recommends meson gettext cython3 libglib2.0-dev python3-dev python-gi-dev libbluetooth-dev
       - run: meson --warnlevel 3 --buildtype debug -Druntime_deps_check=false builddebug
@@ -36,7 +36,7 @@ jobs:
     container:
       image: python:${{ matrix.python }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - run: python3 -m pip install --user flake8
       - run: python3 -m flake8
 
@@ -55,7 +55,7 @@ jobs:
     container:
       image: python:${{ matrix.python }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - run: apt-get update
       - run: apt-get install -y -qq --no-install-recommends automake autoconf libtool autopoint gettext libglib2.0-dev python-gi-dev libbluetooth-dev iproute2
       - run: python3 -m pip install cython mypy pycairo>=1.22.0
@@ -79,7 +79,7 @@ jobs:
     container:
       image: python:${{ matrix.python }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - run: apt-get update
       - run: apt-get install -y -qq --no-install-recommends automake autoconf libtool autopoint gettext libglib2.0-dev python-gi-dev libbluetooth-dev iproute2 libgirepository1.0-dev gir1.2-gtk-3.0 gir1.2-nm-1.0 libpulse0 libpulse-mainloop-glib0 libdbus-1-dev
       - run: python3 -m pip install cython pygobject python-dbusmock dbus-python

.github/workflows/potfile.yml

@@ -9,7 +9,7 @@ jobs:
   update-pot:
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - run: sudo apt-get update
       - run: sudo apt-get install -y -qq --no-install-recommends autopoint gettext cython3 libglib2.0-dev python-gi-dev libbluetooth-dev
       - run: CYTHONEXEC=cython3 ./autogen.sh

.github/workflows/release.yml

@@ -7,7 +7,7 @@ jobs:
   release:
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - run: echo "::set-output name=VERSION::${GITHUB_REF#refs/tags/}"
         id: version
       - run: |

.github/workflows/weblate.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - env:
           TOKEN: ${{ secrets.WEBLATE_KEY }}
         run: "curl -F file=@po/blueman.pot -F method=source -H \"Authorization: Token $TOKEN\" https://hosted.weblate.org/api/translations/blueman/blueman/en/file/"