envvars-api: bump to 0.0.50-20240619035607-42829b67
From 0.0.49-20240612132227-4cbdd42c To 0.0.50-20240619035607-42829b67 See https://gitlab.wikimedia.org/repos/cloud/toolforge/envvars-api/-/releases
Signed-off-by: Raymond Ndibe rolisaemeka-ctr@wikimedia.org