Add dockerfile/gha upgrade commands and use Go 1.26

Changelog for 0.11.83:

Commits
23a5237 Update arkade to Go 1.26 by @alexellis
43bfdf4 Include source of alexellis/gha-bump by @alexellis
865c613 Add command to upgrade images in Dockerfile by @alexellis
92c7c3a Fix kubie move and how existing binaries are replaced by @alexellis
36c5f91 Restore end marker for tools list in README by @alexellis

Changes: 0.11.82...0.11.83

Generated by Derek