fix(ci): install jq for deploy validation regressions

.gitea/tests/deploy-validation.sh

@@ -29,7 +29,7 @@ if validate_compose_file "$scratch/compose.yaml" >"$scratch/config.log" 2>&1; th
   echo 'Full Compose validation accepted a missing variable' >&2
   exit 1
 fi
-rg -q 'required for this regression' "$scratch/config.log"
+grep -q 'required for this regression' "$scratch/config.log"
 HOMELAB_TEST_REQUIRED=present validate_compose_file "$scratch/compose.yaml"
 
 cat >"$scratch/resources.json" <<'JSON'
@@ -70,7 +70,7 @@ if check_referenced_secrets >"$scratch/secrets.log"; then
   echo 'Namespace-scoped Secret check accepted a missing Secret' >&2
   exit 1
 fi
-rg -q 'MISSING OR UNREADABLE: app/credentials' "$scratch/secrets.log"
+grep -q 'MISSING OR UNREADABLE: app/credentials' "$scratch/secrets.log"
 # API/rendering errors must not produce an empty reference list and pass.
 kubectl() { return 1; }
 if check_referenced_secrets >"$scratch/secrets.log"; then