build: exclude .go-version from imports check (#32141)

scripts/goimportscheck.sh

@@ -29,7 +29,7 @@ fi
 # "IFS" environment variable, but the primary place we want to run this right
 # now is in our "quick checks" workflow and that _does_ have a reasonably
 # modern version of Bash.
-readarray -t target_files < <(git diff --name-only ${base_branch} --diff-filter=MA | grep "\.go" | grep -v ".pb.go")
+readarray -t target_files < <(git diff --name-only ${base_branch} --diff-filter=MA | grep "\.go" | grep -v ".pb.go" | grep -v ".go-version")
 
 # NOTE: The above intentionally excludes .pb.go files because those are
 # generated by a tool (protoc-gen-go) which itself doesn't produce