adds 404 check when fetching repo public key (firebase#5643)

Author: bkendall

CHANGELOG.md

@@ -1 +1,2 @@
 - The hosting emulator integration with web frameworks now has improved support for HMR and dev-tools. (#5582)
+- Fixes an issue where `init hosting:github` would hang if it could not access a repository's public key. (#5317)

src/init/features/hosting/github.ts

@@ -418,7 +418,7 @@ async function promptForRepo(
           key = body.key;
           keyId = body.key_id;
         } catch (e: any) {
-          if (e.status === 403) {
+          if ([403, 404].includes(e.status)) {
             logger.info();
             logger.info();
             logWarning(