Stop pushing new images to DockerHub #2624

Job	Run time
Lint bash, docker, markdown, and yaml	46s
Validate musl Docker image builds	17s
Validate musl Docker release image builds	28s
Validate GNU Docker image builds	41s
Validate Windows Docker image builds	1m 1s
armhf Linux glibc	45s
arm Linux glibc	47s
aarch64 Linux glibc	47s
riscv64 Linux glibc	48s
Validate Windows Docker release image builds	59s
Verify CHANGELOG is valid	12s
x86-64 Linux glibc	48s
x86-64 Linux musl	50s
x86-64 Apple Darwin	59s
Validate GNU Docker release image builds	39s
x86-64 Windows MSVC	51s
use ${{ matrix.directives }}	1s
	11m 39s

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