ci: Add explicit permissions to GitHub Actions workflows (#607)

Co-authored-by: Minh Nguyen Cong <[email protected]>

Author: Copilot

.github/workflows/build_and_test.yml

@@ -7,6 +7,10 @@ on:
   push:
     branches:
       - main
+
+permissions:
+  contents: read
+
 jobs:
   build-and-test:
     runs-on: ${{ matrix.os }}

.github/workflows/releases.yml

@@ -10,6 +10,9 @@ on:
     types:
       - released
 
+permissions:
+  contents: read
+
 jobs:
   notify:
     # This job can run on the latest Ubuntu

.github/workflows/semantic-pr.yml

@@ -7,6 +7,9 @@ on:
       - edited
       - synchronize
 
+permissions:
+  pull-requests: read
+
 jobs:
   main:
     name: Validate semantic PR title

.github/workflows/spell-check-lint.yml

@@ -4,6 +4,10 @@ on:
     types: [opened, synchronize, edited]
     branches:
       - main
+
+permissions:
+  contents: read
+
 jobs:
   spellcheck-request-title:
     runs-on: ubuntu-latest