Fix the altair version specification to be <=5.1.2 to avoid conflict … #1468

Job	Run time
changes	4s
test-build-vscode-extension	0s
test-mountable	0s
test-kernel	2m 10s
test-desktop	0s
test-sharing-common	0s
test-sharing-editor	0s
test-stlite-server	3m 24s
build-sharing	8m 27s
build-mountable	7m 48s
build-kernel	3m 7s
build-desktop	6m 55s
publish-kernel	0s
publish-desktop	0s
publish-mountable	0s
publish-vscode-extension	0s
Deploy @stlite/sharing to Cloudflare Pages	29s
build-sharing-editor	2m 19s
Deploy @stlite/sharing-editor to Cloudflare Pages	34s
	35m 17s

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