ci: try to optimize manual stage checker for gitlab ci

Signed-off-by: Huaqi Fang <578567190@qq.com>

Author: fanghuaqi

.gitlab-ci.yml

@@ -202,8 +202,11 @@ cache:
 
 .job_rules:
     interruptible: true
+    # Rules are evaluated when the pipeline is created, and evaluated in order.
+    # When a match is found, no more rules are checked
     rules:
-        - changes:
+        - if: $CI_JOB_STAGE == "manual"
+          changes:
             - conf/**/*
             - .github/**/*
             - Makefile*
@@ -213,8 +216,17 @@ cache:
             - freeloader
             - linux
             - u-boot
-        - if: $CI_JOB_STAGE == "manual"
           when: manual
+        - changes:
+            - conf/**/*
+            - .github/**/*
+            - Makefile*
+            - .gitlab-ci.yml
+            - buildroot
+            - opensbi
+            - freeloader
+            - linux
+            - u-boot
     tags:
         - env::shell
         - net::outside