Add missing slash breaking image builds

[AlanCoding]

SUMMARY

Image builds not pushing, because

docker buildx create --name docker-compose-buildx
docker-compose-buildx
docker buildx use docker-compose-buildx
docker buildx build \
	--ssh default=/tmp/ssh-Mgp3py5hRV2r/agent.2859
ERROR: "docker buildx build" requires exactly 1 argument.
See 'docker buildx build --help'.

Usage:  docker buildx build [OPTIONS] PATH | URL | -

Start a build
make: [Makefile:576: docker-compose-buildx] Error 1 (ignored)
push \
	--build-arg BUILDKIT_INLINE_CACHE=1 \
	--no-cache \
	--platform=linux/amd64,linux/arm64   \
	--tag ghcr.io/ansible/awx_devel:devel \
	-f Dockerfile.dev .
bash: line 2: push: command not found
make: [Makefile:577: docker-compose-buildx] Error 127 (ignored)
docker buildx rm docker-compose-buildx
docker-compose-buildx removed

Bash command wasn't right, due to recent SSH auth changes in actions

ISSUE TYPE

• Bug, Docs Fix or other nominal change

COMPONENT NAME

• API

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.32%. Comparing base (7d30dff) to head (cf2ce26).
Report is 1 commits behind head on devel.

✅ All tests successful. No failed tests found.

[AlanCoding]

Introduced by #15838

Looking through that diff, it appears to be just this 1 line.