Update actions/cache action to v5

Author: renovate[bot]

.github/workflows/ci.yml

@@ -26,7 +26,7 @@ jobs:
           otp-version: ${{ env.OTP_VERSION }}
           elixir-version: ${{ env.ELIXIR_VERSION }}
       - name: Restore dependencies and build cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: |
             _build
@@ -73,7 +73,7 @@ jobs:
           otp-version: ${{ matrix.otp }}
           elixir-version: ${{ matrix.elixir }}
       - name: Restore dependencies and build cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: |
             _build
@@ -134,7 +134,7 @@ jobs:
           otp-version: ${{ env.OTP_VERSION }}
           elixir-version: ${{ env.ELIXIR_VERSION }}
       - name: Restore dependencies and build cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: |
             _build
@@ -164,15 +164,15 @@ jobs:
           elixir-version: ${{ env.ELIXIR_VERSION }}
 
       - name: Restore dependencies and build cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: |
             _build
             deps
           key: ${{ runner.os }}-otp-${{ steps.beam.outputs.otp-version }}-elixir-${{ steps.beam.outputs.elixir-version }}-mix-${{ hashFiles('mix.lock') }}
           restore-keys: ${{ runner.os }}-otp-${{ steps.beam.outputs.otp-version }}-elixir-${{ steps.beam.outputs.elixir-version }}-
       - name: Restore PLT cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         id: plt_cache
         with:
           key: |