IT-3318: Revert to *6a for strides account #511

Job	Run time
pre-commit	14s
test-npm-deps	9s
jinja-lint	6s
org-formation	0s
sceptre-admincentral	0s
sceptre-organizations	0s
sceptre-itsandbox	0s
sceptre-bmgfki	0s
sceptre-logcentral	0s
sceptre-sageit-prod	0s
sceptre-sageit-staging	0s
sceptre-scicomp	0s
sceptre-scipooldev	0s
sceptre-scipoolprod	0s
sceptre-securitycentral	0s
sceptre-strides	0s
sceptre-strides-ampad-workflows	0s
sceptre-synapsedev	0s
sceptre-synapseprod	0s
sceptre-bridgedev	0s
sceptre-bridgeprod	0s
sceptre-imagecentral	0s
sceptre-stridespool	0s
	29s

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