chore(deps): update actions/cache action to v6

Author: renovate[bot]

.github/workflows/ci.yml

@@ -48,7 +48,7 @@ jobs:
           virtualenvs-in-project: true
 
       - name: Cache Poetry dependencies
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: .venv
           key: venv-lint-${{ runner.os }}-${{ env.PYTHON_VERSION }}-${{ hashFiles('**/poetry.lock') }}
@@ -103,7 +103,7 @@ jobs:
           virtualenvs-in-project: true
 
       - name: Cache Poetry dependencies
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: .venv
           key: venv-${{ runner.os }}-${{ env.PYTHON_VERSION }}-${{ hashFiles('**/poetry.lock') }}
@@ -164,7 +164,7 @@ jobs:
           virtualenvs-in-project: true
 
       - name: Cache Poetry dependencies
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: .venv
           key: venv-${{ runner.os }}-${{ env.PYTHON_VERSION }}-${{ hashFiles('**/poetry.lock') }}
@@ -223,7 +223,7 @@ jobs:
           virtualenvs-in-project: true
 
       - name: Cache Poetry dependencies
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: .venv
           key: venv-${{ runner.os }}-${{ env.PYTHON_VERSION }}-${{ hashFiles('**/poetry.lock') }}
@@ -264,7 +264,7 @@ jobs:
           virtualenvs-in-project: true
 
       - name: Cache Poetry dependencies
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: .venv
           key: venv-${{ runner.os }}-${{ env.PYTHON_VERSION }}-${{ hashFiles('**/poetry.lock') }}
@@ -324,7 +324,7 @@ jobs:
           virtualenvs-in-project: true
 
       - name: Cache Poetry dependencies
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: .venv
           key: venv-${{ runner.os }}-${{ env.PYTHON_VERSION }}-${{ hashFiles('**/poetry.lock') }}
@@ -377,7 +377,7 @@ jobs:
           virtualenvs-in-project: true
 
       - name: Cache Poetry dependencies
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: .venv
           key: venv-${{ runner.os }}-${{ env.PYTHON_VERSION }}-${{ hashFiles('**/poetry.lock') }}
@@ -484,7 +484,7 @@ jobs:
           virtualenvs-in-project: true
 
       - name: Cache Poetry dependencies
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: .venv
           key: venv-${{ runner.os }}-${{ env.PYTHON_VERSION }}-${{ hashFiles('**/poetry.lock') }}