test: fix grepping fixed string starts from hyphen

Follow-up for 85445fba22b2f81853a3f018ed1f28864cef37fc.

Fixes #21718.

diff --git a/test/units/testsuite-62.sh b/test/units/testsuite-62.sh
index 2f3b18bec3d215fce1439058bf3df9273a88d6b4..da40c2f1e7973c9549574ae88cbf8ebed521f17f 100755 (executable)
--- a/test/units/testsuite-62.sh
+++ b/test/units/testsuite-62.sh
@@ -47,7 +47,7 @@ if [[ "$KERNEL_MAJOR" -lt $MAJOR_REQUIRED || ("$KERNEL_MAJOR" -eq $MAJOR_REQUIRE
     exit 0
 fi
 
-if systemctl --version | grep -q -F "-BPF_FRAMEWORK"; then
+if systemctl --version | grep -q -F -- "-BPF_FRAMEWORK"; then
     echo "bpf-framework is disabled" >>/skipped
     exit 0
 fi