chore: update various dependencies (#7503)

This will help us pass the security scanners.

scripts/Dockerfile.base

@@ -1,7 +1,7 @@
 # This is the base image used for Coder images. It's a multi-arch image that is
 # built in depot.dev for all supported architectures. Since it's built on real
 # hardware and not cross-compiled, it can have "RUN" commands.
-FROM alpine:latest
+FROM alpine:3.18
 
 # We use a single RUN command to reduce the number of layers in the image.
 # NOTE: Keep the Terraform version in sync with minTerraformVersion and
@@ -12,7 +12,7 @@ RUN apk add --no-cache \
 		bash \
 		git \
 		openssh-client \
-		terraform=1.3.4-r4 && \
+		terraform=1.4.6-r1 && \
 	addgroup \
 		-g 1000 \
 		coder && \