fix(ci): add checkout action into check-changes job

Signed-off-by: Tilman Vatteroth <git@tilmanvatteroth.de>

.github/workflows/backend-docker.yml

@@ -19,6 +19,7 @@ jobs:
     outputs:
       changed: ${{ steps.changed.outputs.files }}
     steps:
+      - uses: actions/checkout@v3
       - name: Check for backend file changes
         uses: dorny/paths-filter@v2
         id: changed

.github/workflows/backend-e2e-tests.yml

@@ -26,6 +26,7 @@ jobs:
     outputs:
       changed: ${{ steps.changed.outputs.files }}
     steps:
+      - uses: actions/checkout@v3
       - name: Check for backend file changes
         uses: dorny/paths-filter@v2
         id: changed

.github/workflows/backend-tests.yml

@@ -27,6 +27,7 @@ jobs:
     outputs:
       changed: ${{ steps.changed.outputs.files }}
     steps:
+      - uses: actions/checkout@v3
       - name: Check for backend file changes
         uses: dorny/paths-filter@v2
         id: changed

.github/workflows/frontend-docker.yml

@@ -25,6 +25,7 @@ jobs:
     outputs:
       changed: ${{ steps.changed.outputs.files }}
     steps:
+      - uses: actions/checkout@v3
       - name: Check for frontend file changes
         uses: dorny/paths-filter@v2
         id: changed

.github/workflows/frontend-e2e-tests.yml

@@ -36,6 +36,7 @@ jobs:
     outputs:
       changed: ${{ steps.changed.outputs.files }}
     steps:
+      - uses: actions/checkout@v3
       - name: Check for frontend file changes
         uses: dorny/paths-filter@v2
         id: changed

.github/workflows/frontend-lint.yml

@@ -26,6 +26,7 @@ jobs:
     outputs:
       changed: ${{ steps.changed.outputs.files }}
     steps:
+      - uses: actions/checkout@v3
       - name: Check for frontend file changes
         uses: dorny/paths-filter@v2
         id: changed

.github/workflows/frontend-netlify-deploy-main.yml

@@ -29,6 +29,7 @@ jobs:
     outputs:
       changed: ${{ steps.changed.outputs.files }}
     steps:
+      - uses: actions/checkout@v3
       - name: Check for frontend file changes
         uses: dorny/paths-filter@v2
         id: changed

.github/workflows/frontend-netlify-deploy-pr.yml

@@ -47,6 +47,7 @@ jobs:
     outputs:
       changed: ${{ steps.changed.outputs.files }}
     steps:
+      - uses: actions/checkout@v3
       - name: Check for frontend file changes
         uses: dorny/paths-filter@v2
         id: changed

.github/workflows/frontend-test-and-build.yml

@@ -23,6 +23,7 @@ jobs:
     outputs:
       changed: ${{ steps.changed.outputs.files }}
     steps:
+      - uses: actions/checkout@v3
       - name: Check for frontend file changes
         uses: dorny/paths-filter@v2
         id: changed