chore: pin terraform to 1.5.2 (#8322)

The Alpine ARM builders are no longer behind on releases.

scripts/Dockerfile.base

@@ -13,11 +13,8 @@ RUN apk add --no-cache \
 		git \
 		openssh-client && \
 	# Use the edge repo, since Terraform doesn't seem to be backported to 3.18.
-	# TODO: remove =~
-	# For some reason alpine's ARM builders are offline, so ARM builds will have
-	# to fall back to 1.5.0.
 	apk add --no-cache --repository=https://dl-cdn.alpinelinux.org/alpine/edge/community \
-		terraform=~1.5-r0 && \
+		terraform=1.5.2-r0 && \
 	addgroup \
 		-g 1000 \
 		coder && \