Bump net-imap from 0.4.16 to 0.4.19 in /examples/stacks/rails/blog #6808

Job	Run time
golangci-lint (ubuntu-latest)	31s
build-devbox (ubuntu-latest)	26s
Spell Check with Typos	4s
golangci-lint (macos-13)	5m 8s
build-devbox (macos-13)	1m 10s
Test Flake Build	1m 25s
test-nix-versions (ubuntu-latest, 2.15.1)	1m 9s
auto-nix-install (ubuntu-latest, true)	45s
test-nix-versions (ubuntu-latest, 2.16.1)	1m 2s
auto-nix-install (ubuntu-latest, false)	51s
test-nix-versions (ubuntu-latest, 2.17.0)	38s
auto-nix-install (macos-13, true)	3m 28s
test (not-main, ubuntu-latest, project-tests-only, 2.12.0)	9m 37s
test-nix-versions (ubuntu-latest, 2.18.0)	38s
auto-nix-install (macos-13, false)	2m 57s
test-nix-versions (ubuntu-latest, 2.19.2)	37s
test (not-main, ubuntu-latest, project-tests-only, 2.19.2)	8m 42s
test-nix-versions (ubuntu-latest, 2.24.7)	47s
test (not-main, ubuntu-latest, project-tests-only, 2.20.1)	8m 25s
test-nix-versions (macos-13, 2.15.1)	4m 30s
test (not-main, ubuntu-latest, project-tests-off, 2.12.0)	9m 7s
test-nix-versions (macos-13, 2.16.1)	5m 46s
test (not-main, ubuntu-latest, project-tests-off, 2.19.2)	9m 12s
test-nix-versions (macos-13, 2.17.0)	2m 44s
test (not-main, ubuntu-latest, project-tests-off, 2.20.1)	8m 44s
test-nix-versions (macos-13, 2.18.0)	3m 22s
test-nix-versions (macos-13, 2.19.2)	3m 11s
test-nix-versions (macos-13, 2.24.7)	3m 31s
	1h 38m 27s

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