github: Increase timeout for test tasks

.github/workflows/ci.yml

@@ -131,7 +131,7 @@ jobs:
         path: ${{ runner.temp }}
 
     - name: Test qemu_x86_virt + ${{ matrix.suite }} ${{ matrix.arch }}
-      timeout-minutes: 5
+      timeout-minutes: 15
       run: |
         ./test/qemu.sh $RUNNER_TEMP/boot-qemu_x86_virt.bin.gz \
                        $RUNNER_TEMP/${{ matrix.os }}-${{ matrix.suite }}-${{ matrix.arch }}-*.bin.gz

.github/workflows/prebuilt.yml

@@ -77,6 +77,6 @@ jobs:
         wget $DL_BASE$(wget -O - $CDN_BASE$DEBIAN_INDEX | grep $DEBIAN | sort | tail -n 1 || echo /404)
 
     - name: Test
-      timeout-minutes: 5
+      timeout-minutes: 15
       run: |
         ./test/qemu.sh $BOOT*.bin.gz $DEBIAN*.bin.gz