Update devcontainer image: v0.7.0-alpha.3 #6447

Job	Run time
docs	4m 12s
clippy	4m 57s
cairofmt	5s
dojo-core-test	4m 59s
dojo-spawn-and-move-example-test	4m 44s
dojo-world-bindings-check	2m 53s
ensure-wasm	1m 46s
ensure-windows	11m 4s
fmt	1m 19s
test	12m 47s
test-hurl	1m 32s
	50m 18s

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