chore(deps): bump codecov/codecov-action action from v5.5.4 to v6

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/test.yml

@@ -51,7 +51,7 @@ jobs:
       env:
         XDEBUG_MODE: ${{ matrix.coverage && 'coverage' || 'off' }}
     - name: Report coverage
-      uses: codecov/codecov-action@75cd11691c0faa626561e295848008c8a7dddffe # v5.5.4
+      uses: codecov/codecov-action@57e3a136b779b570ffcdbf80b3bdc90e7fab3de2 # v6
       if: ${{ !cancelled() && matrix.coverage }}
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
@@ -192,7 +192,7 @@ jobs:
             if: ${{ always() }}
             run: cat nextcloud/data/mail-*-*-imap.log
           - name: Report coverage
-            uses: codecov/codecov-action@75cd11691c0faa626561e295848008c8a7dddffe # v5.5.4
+            uses: codecov/codecov-action@57e3a136b779b570ffcdbf80b3bdc90e7fab3de2 # v6
             if: ${{ !cancelled() && matrix.coverage }}
             with:
               token: ${{ secrets.CODECOV_TOKEN }}