5.15 branch fails integration because license info in headers does not match updated ci template

issue highlighted here

: Test failed

 agent:2021/02/26 13:48:15 agent.go:231: ERROR building: exit status 162

 INFO:workitem.py:646(116553): Agent FINISHED FAIL: testing license: tqtc-boot2qt/doc/ee3ea24f09006fccc8da3a23b88f42c4b3a24aa2/LinuxUbuntu_18_04x86_64LinuxUbuntu_18_04x86_64GCCqtci-linux-Ubuntu-18.04-x86_64-761459LicenseCheck_TestOnly/12f83de1804801fb7a87c49334248eac5cce3835/Test

 INFO:workitem.py:728(116553): <a href="https://qtmetrics.intra.qt.io/d/nOAsINmZz/jimis-telegraf-vms?orgId=1&from=1614347283000&to=1614347298000&var-server=1612692517-180420">VM metrics</a>

 INFO:workitem.py:731(116553): <a href="https://qtmetrics.intra.qt.io/d/nOAsINNZz/jimis-telegraf-hosts?orgId=1&from=1614347283000&to=1614347298000&var-server=finer-panda">Host metrics</a>

Build log: http://ci-files01-hki.intra.qt.io/cilogs/tqtc-boot2qt/doc/ee3ea24f09006fccc8da3a23b88f42c4b3a24aa2/LinuxUbuntu_18_04x86_64LinuxUbuntu_18_04x86_64GCCqtci-linux-Ubuntu-18.04-x86_64-761459LicenseCheck_TestOnly/12f83de1804801fb7a87c49334248eac5cce3835/test_1614347330/log.txt.gz

Details: http://ci-files01-hki.intra.qt.io:8080/coin/integration/tqtc-boot2qt/doc/tasks/1614346325

Tested changes (refs/builds/qtci/5.15/1614346287):

  https://codereview.qt-project.org/c/tqtc-boot2qt/doc/+/336153/11 Documentation Update for 5.15.3 LTS Release