Harden build and update it less monthly, not weekly.

Author: fgm

.github/dependabot.yml

@@ -8,9 +8,9 @@ updates:
   - package-ecosystem: "gomod" # See documentation for possible values
     directory: "/" # Location of package manifests
     schedule:
-      interval: "weekly"
+      interval: "monthly"
 
   - package-ecosystem: github-actions
     directory: /
     schedule:
-      interval: "weekly"
+      interval: "monthly"

Makefile

@@ -20,6 +20,7 @@ bench:
 cover:
 	# This runs the benchmarks just once, as unit tests, for coverage reporting only.
 	# It does not replace running "make bench".
+	mkdir -p coverage
 	go test -v -race -run=. -bench=. -benchtime=1x -coverprofile=coverage/cover.out -covermode=atomic ./...
 
 .PHONY: test