Bump actions/cache from 3 to 4

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

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

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

.github/workflows/continuous-integration.yml

@@ -30,7 +30,7 @@ jobs:
         uses: Gr1N/setup-poetry@v8
 
       - name: Load Poetry Cached Libraries ⬇
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.cache/pypoetry
           key: ${{ runner.os }}-poetry-${{ hashFiles('**/poetry.lock') }}
@@ -76,7 +76,7 @@ jobs:
         uses: Gr1N/setup-poetry@v8
 
       - name: Load Poetry Cached Libraries ⬇
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.cache/pypoetry
           key: ${{ runner.os }}-poetry-${{ hashFiles('**/poetry.lock') }}
@@ -126,7 +126,7 @@ jobs:
         uses: Gr1N/setup-poetry@v8
 
       - name: Load Poetry Cached Libraries ⬇
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.cache/pypoetry
           key: ${{ runner.os }}-poetry-${{ hashFiles('**/poetry.lock') }}