fix: SHELL env (path to ZSH was wrong)

Author: EvanCarroll

devops/build-image.sh

@@ -18,7 +18,7 @@ EOT
 buildah config \
 	--author "Evan Carroll" \
 	--env "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" \
-	--env "SHELL=/usr/bin/zsh" \
+	--env "SHELL=/bin/zsh" \
 	--env "DISABLE_TELEMETRY=1" \
 	--env "DISABLE_AUTOUPDATER=1" \
 	--cmd "" \