Update CI dependencies to v4

.github/workflows/main.yaml

@@ -14,7 +14,7 @@ jobs:
     if: "!startsWith(github.event.head_commit.message, '[skip ci] ')"
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: camptocamp/initialise-gopass-summon-action@v2
         with:
           ci-gpg-private-key: ${{secrets.CI_GPG_PRIVATE_KEY}}
@@ -25,7 +25,7 @@ jobs:
       - run: echo "${HOME}/.local/bin" >> ${GITHUB_PATH}
       - run: python3 -m pip install --user --requirement=ci/requirements.txt
 
-      - uses: actions/cache@v3
+      - uses: actions/cache@v4
         with:
           path: ~/.cache/pre-commit
           key: pre-commit-${{ hashFiles('.pre-commit-config.yaml') }}