CI: kconfig check: use --keep-going (MR 5491)

Use the new --keep-going parameter so the check doesn't stop on first
error. This was recently added in pmbootstrap MR 2384 to make the
default behavior more userfriendly.

[ci:skip-build]: already built successfully in CI

.ci/lib/check_changed_kernels.py

@@ -17,7 +17,7 @@ def check_kconfig(pkgnames):
         pkgname = pkgnames[i]
         print(f"  ({i+1}/{len(pkgnames)}) {pkgname}")
 
-        p = subprocess.run(["pmbootstrap", "kconfig", "check", pkgname],
+        p = subprocess.run(["pmbootstrap", "kconfig", "check", "--keep-going", pkgname],
                            check=False)
 
         if p.returncode:
@@ -27,7 +27,7 @@ def check_kconfig(pkgnames):
 
 
 def check_kconfig_all():
-    p = subprocess.run(["pmbootstrap", "kconfig", "check"], check=False)
+    p = subprocess.run(["pmbootstrap", "kconfig", "check", "--keep-going"], check=False)
     return p.returncode == 0