Set workflow permissions explicitly (#151)

Fix actions/missing-workflow-permissions in Code Scanning alerts

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Author: wata727

.github/workflows/build.yml

@@ -10,6 +10,9 @@ on:
   schedule:
     - cron: "0 0 * * *"
 
+permissions:
+  contents: read
+
 jobs:
   test:
     name: ${{ matrix.os }}

.github/workflows/e2e.yml

@@ -10,6 +10,9 @@ on:
   schedule:
     - cron: "0 0 * * *"
 
+permissions:
+  contents: read
+
 jobs:
   e2e:
     name: ${{ matrix.os }} (${{ matrix.version }})

.github/workflows/goreleaser.yml

@@ -8,6 +8,9 @@ on:
     branches:
       - main
 
+permissions:
+  contents: read
+
 jobs:
   check:
     runs-on: ubuntu-latest