Always trigger release workflow to check the build correctness

.github/workflows/release.yml

@@ -3,6 +3,23 @@ on:
   push:
     tags:
       - 'v[0-9]+.[0-9]+.[0-9]+*'
+    branches:
+      - main
+    paths:
+      - '.github/workflows/release.yml'
+      - '.ruby-version'
+      - '**.gemspec'
+      - '**Gemfile'
+      - 'Rakefile'
+      - '**.rb'
+  pull_request:
+    paths:
+      - '.github/workflows/release.yml'
+      - '.ruby-version'
+      - '**.gemspec'
+      - '**Gemfile'
+      - 'Rakefile'
+      - '**.rb'
   workflow_dispatch:
 
 jobs:
@@ -32,6 +49,7 @@ jobs:
       - build
     env:
       GH_TOKEN: ${{ github.token }}
+    if: startsWith(github.ref, 'refs/tags/')
     steps:
       # Required to checkout for gh command
       - uses: actions/checkout@v4
@@ -58,6 +76,8 @@ jobs:
     # https://github.com/kachick/irb-power_assert/settings/environments
     environment: release
 
+    if: startsWith(github.ref, 'refs/tags/')
+
     steps:
       - uses: actions/checkout@v4
       - name: Set up Ruby