Bump django from 4.2.17 to 4.2.18 in /examples/stacks/django #6816

Job	Run time
build-devbox (ubuntu-latest)	30s
build-devbox (macos-13)	1m 1s
Test Flake Build	1m 33s
golangci-lint (ubuntu-latest)	46s
Spell Check with Typos	7s
golangci-lint (macos-13)	3m 38s
auto-nix-install (ubuntu-latest, true)	45s
auto-nix-install (ubuntu-latest, false)	47s
test-nix-versions (ubuntu-latest, 2.15.1)	1m 0s
auto-nix-install (macos-13, true)	2m 39s
test-nix-versions (ubuntu-latest, 2.16.1)	1m 0s
auto-nix-install (macos-13, false)	2m 44s
test-nix-versions (ubuntu-latest, 2.17.0)	38s
test-nix-versions (ubuntu-latest, 2.18.0)	45s
test (not-main, ubuntu-latest, project-tests-only, 2.12.0)	8m 48s
test-nix-versions (ubuntu-latest, 2.19.2)	43s
test (not-main, ubuntu-latest, project-tests-only, 2.19.2)	8m 38s
test (not-main, ubuntu-latest, project-tests-only, 2.20.1)	9m 14s
test-nix-versions (ubuntu-latest, 2.24.7)	54s
test (not-main, ubuntu-latest, project-tests-off, 2.12.0)	9m 51s
test-nix-versions (macos-13, 2.15.1)	3m 42s
test (not-main, ubuntu-latest, project-tests-off, 2.19.2)	8m 20s
test (not-main, ubuntu-latest, project-tests-off, 2.20.1)	8m 52s
test-nix-versions (macos-13, 2.16.1)	4m 32s
test-nix-versions (macos-13, 2.17.0)	2m 57s
test-nix-versions (macos-13, 2.18.0)	3m 58s
test-nix-versions (macos-13, 2.19.2)	2m 47s
test-nix-versions (macos-13, 2.24.7)	4m 6s
	1h 35m 15s

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