Extension of the current Kernel SRU cycle

[Kleber Sacilotto de Souza]

The current Kernel SRU cycle has been extended by a week. The schedule
for the current and the next cycles and the kernels in -proposed are as
follows:

cycle: 17-Feb through 15-Mar (4 weeks)
====================================================================
         12-Feb   Last day for kernel commits for this cycle.
17-Feb - 21-Feb   Kernel prep week.
24-Feb - 13-Mar   Bug verification & Regression testing.
         16-Mar   Release to -updates.


Kernel Versions
====================================================================
eoan:
    linux:               5.3.0-41.33
bionic:
    linux:               4.15.0-89.89
    linux-hwe:           5.3.0-41.33~18.04.1
xenial:
    linux:               4.4.0-175.205
    linux-hwe:           4.15.0-89.89~16.04.1


cycle: 16-Mar through 05-Apr (3 weeks)
====================================================================
         11-Mar   Last day for kernel commits for this cycle.
16-Mar - 20-Mar   Kernel prep week.
23-Mar - 03-Apr   Bug verification & Regression testing.
         06-Apr   Release to -updates.