Specify permissions explicitly in workflows

Prompted by CodeQL alerts for `actions/missing-workflow-permissions`.

Author: Cirras

.github/workflows/build.yml

@@ -12,6 +12,9 @@ on:
       - 'LICENSE.txt'
       - 'NOTICE.txt'
 
+permissions:
+  contents: read
+
 jobs:
   install:
     runs-on: ubuntu-latest

.github/workflows/format.yml

@@ -10,6 +10,9 @@ on:
     paths:
       - '**.java'
 
+permissions:
+  contents: read
+
 jobs:
   check-format:
     runs-on: ubuntu-latest

.github/workflows/release.yml

@@ -5,6 +5,9 @@ on:
     tags:
       - v*
 
+permissions:
+  contents: write
+
 jobs:
   publish:
     runs-on: ubuntu-latest

.github/workflows/sonar.yml

@@ -5,6 +5,9 @@ on:
     branches:
       - 'master'
 
+permissions:
+  contents: read
+
 jobs:
   scan:
     runs-on: ubuntu-latest