ci(build): include more paths in the pipeline's triggering conditions

Signed-off-by: k4yt3x <i@k4yt3x.com>

Author: k4yt3x

.github/workflows/build.yml

@@ -2,14 +2,18 @@ name: Build
 on:
   push:
     paths:
+      - ".github/workflows/build.yml"
       - "include/**"
       - "src/**"
+      - "tools/**"
       - "third_party/**"
       - "CMakeLists.txt"
   pull_request:
     paths:
+      - ".github/workflows/build.yml"
       - "include/**"
       - "src/**"
+      - "tools/**"
       - "third_party/**"
       - "CMakeLists.txt"
   workflow_dispatch: {}