Update base image to debian bookworm #757

Job	Run time
Change terraform 11	21s
No changes	22s
Change terraform 12	23s
No changes without comment	20s
Plan single variable	23s
Plan variables some which are sensitive	24s
Error with invalid paths	28s
Test plan text on Terraform 1.4	35s
Change without github comment	24s
Error without comment	20s
Change terraform 14	26s
Change with shell init commands	23s
Add comment without token	22s
Plan using deprecated var and sensitive variable	24s
Change terraform 15	24s
Change terraform 13	26s
Change terraform 15.4	24s
Test on arm64	45s
Default path	31s
Change latest terraform	23s
Plan single sensitive variable	25s
Error	23s
always-new	40s
Full colour plan for diff highlighting	48s
	10m 44s

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