Update required disk space for docker in CF

[nwmac]

We should check this - but for now, the disk space requirement seems to be slightly larger than before.

[linux-foundation-easycla[bot]]

The committers are authorized under a signed CLA.

• :white_check_mark: Neil MacDougall (c1d562f7c8c3d7c84d51a56551bf8107e64bd66a)

[codecov-io]

Codecov Report

Merging #4857 (c1d562f) into master (54a0af2) will decrease coverage by 25.36%. The diff coverage is n/a.

@@             Coverage Diff             @@
##           master    #4857       +/-   ##
===========================================
- Coverage   52.91%   27.55%   -25.37%     
===========================================
  Files        1141       60     -1081     
  Lines       40149     4693    -35456     
  Branches     5122        0     -5122     
===========================================
- Hits        21246     1293    -19953     
+ Misses      18719     3216    -15503     
  Partials      184      184