chore: rename default flake template #2

Job	Run time
nix-check	1m 1s
build (ubuntu-latest, holochain, hc, hc-run-local-services, hc-sandbox, hcterm)	49s
build (ubuntu-latest, lair-keystore)	30s
build (ubuntu-latest, hc-launch)	58s
build (ubuntu-latest, hc-scaffold)	38s
build (macos-latest, holochain, hc, hc-run-local-services, hc-sandbox, hcterm)	1m 51s
build (macos-latest, lair-keystore)	1m 0s
build (macos-latest, hc-launch)	1m 33s
build (macos-latest, hc-scaffold)	2m 14s
build (macos-13, holochain, hc, hc-run-local-services, hc-sandbox, hcterm)	2m 55s
build (macos-13, lair-keystore)	1m 39s
build (macos-13, hc-launch)	2m 22s
build (macos-13, hc-scaffold)	1m 59s
	19m 29s

Provide feedback