chore(deps): update gentoo/stage3:latest docker digest to c26fc21 #6222

Job	Run time
Check depencencies	48s
Check for file changes	7s
Check pull request title	4s
Check hyperlinks	50s
Lint the Dockerfile code	28s
Lint the yaml code	4s
Lint the shell code	10s
Check the documentation	0s
Test ${{ matrix.job-purpose }} on ${{ matrix.os-friendly-name }}	0s
Test source on FreeBSD	0s
Test source on OpenBSD	0s
Test source on NetBSD	0s
Docker image for Gentoo	3h 10m 12s
Docker image for Alpine	3s
Docker image for Amazon Linux	2s
Docker image for Arch	3s
Docker image for Clear Linux	3s
Docker image for Debian	5s
Docker image for Fedora	7s
Docker image for Kali	6s
Docker image for Manjaro	10s
Docker image for Oracle Linux	3s
Docker image for Red Hat Enterprise	2s
Docker image for Rocky Linux	2s
Docker image for SUSE Enterprise	3s
Docker image for Ubuntu	2m 2s
Docker image for openSUSE Leap	5s
Docker image for openSUSE Tumbleweed	3s
	3h 15m 42s

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