Bump actions/cache from 2 to 4

Bumps [actions/cache](https://github.com/actions/cache) from 2 to 4.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v2...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/static-analysis.yml

@@ -45,13 +45,13 @@ jobs:
         otp-version: ${{ matrix.otp }}
 
     - name: Restore deps cache
-      uses: actions/cache@v2
+      uses: actions/cache@v4
       with:
         path: deps
         key: ${{ runner.os }}-mix-{{ matrix.otp }}-${{ matrix.elixir }}-${{ hashFiles('**/mix.lock') }}
 
     - name: Restore _build cache
-      uses: actions/cache@v2
+      uses: actions/cache@v4
       with:
         path: _build
         key: ${{ runner.os }}-build-${{ matrix.otp }}-${{ matrix.elixir }}-${{ hashFiles('**/mix.lock') }}
@@ -72,7 +72,7 @@ jobs:
       run: mix deps.compile
 
     - name: Restore Dialyzer cache
-      uses: actions/cache@v2
+      uses: actions/cache@v4
       with:
         path: priv/plts
         key: ${{ runner.os }}-dialyzer-${{ matrix.otp }}-${{ matrix.elixir }}-${{ hashFiles('**/mix.lock') }}

.github/workflows/test.yml

@@ -73,7 +73,7 @@ jobs:
         otp-version: ${{ matrix.otp }}
 
     - name: Restore build and deps caches
-      uses: actions/cache@v2
+      uses: actions/cache@v4
       with:
         path: |
           deps
@@ -119,7 +119,7 @@ jobs:
         otp-version: ${{ matrix.otp }}
 
     - name: Restore build and deps caches
-      uses: actions/cache@v2
+      uses: actions/cache@v4
       with:
         path: |
           deps