ci: update clippy check (#389)

.github/workflows/clippy-pr.yml

@@ -1,22 +0,0 @@
-name: Clippy check for pull request
-
-on:
-  pull_request:
-    branches:
-      - 'main'
-    paths:
-      - '.github/workflows/clippy-pr.yml'
-      - 'userspace/ksud/**'
-
-permissions:
-  checks: write
-
-jobs:
-  clippy:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-
-      - uses: giraffate/clippy-action@v1
-        with:
-          workdir: userspace/ksud

.github/workflows/clippy.yml

@@ -1,12 +1,9 @@
 name: Clippy check
 
-on:
-  push:
-    branches:
-      - 'main'
-    paths:
-      - '.github/workflows/clippy.yml'
-      - 'userspace/ksud/**'
+on: [push, pull_request]
+  paths:
+    - '.github/workflows/clippy.yml'
+    - 'userspace/ksud/**'
 
 env:
   RUSTFLAGS: '-Dwarnings'