fix: dev: [cron] correct invalid usage of ``pipefail``

cron/hooks/pre_deploy

@@ -6,7 +6,7 @@ set -e
 
 root_crontab="$SERVICE_CONFIGSTORE/etc/crontabs/root"
 
-cron_content=$(set pipefail; cron:entries | tr '\0' '\n') || {
+cron_content=$(set -o pipefail; cron:entries | tr '\0' '\n') || {
     err "Failed to make cron entries" >&2
     exit 1
 }

cron/test/entries_from_service

@@ -108,7 +108,7 @@ is out '' TRIM
 
 
 try "
-set pipefail &&
+set -o pipefail &&
 cron:entries_from_service 'foo' '
 (0 0 * * *) {-p 10 -k} dc run --rm foo
 ' | tr '\0' '\n'" "one command no label"
@@ -119,7 +119,7 @@ is out "\
 
 
 try "
-set pipefail &&
+set -o pipefail &&
 cron:entries_from_service 'foo' '
 wiz: (0 0 * * *) {-p 10 -k} dc run --rm foo
 ' | tr '\0' '\n'" "one command with label"
@@ -131,7 +131,7 @@ is out "\
 
 
 try "
-set pipefail &&
+set -o pipefail &&
 cron:entries_from_service 'foo' '
 wiz: (0 0 * * *) {-p 10 -k} dc run --rm foo
 bam: (@daily) {-p 10 -D -k} dc run --rm foo --hop
@@ -146,7 +146,7 @@ is out "\
 
 
 try "
-set pipefail &&
+set -o pipefail &&
 cron:entries_from_service 'foo' '!var-expand
 (0 0 * * *) {-p 10 -k} dc run --rm \$BASE_SERVICE_NAME \$MASTER_BASE_SERVICE_NAME
 ' | tr '\0' '\n'" "using relation's var"