ci: default workflow tokens to read-only contents (#1218)

.github/workflows/auto-label-pr.yml

@@ -3,6 +3,9 @@ on:
   # Runs workflow when activity on a PR in the workflow's repository occurs.
   pull_request_target:
 
+permissions:
+  contents: read
+
 jobs:
   auto-label:
     permissions:

.github/workflows/ci.yml

@@ -12,6 +12,9 @@ env:
   CARGO_TERM_COLOR: always
   ARTIFACT_DIR: release-artifacts
 
+permissions:
+  contents: read
+
 jobs:
   commit-lint:
     name: Lint Commit Messages

.github/workflows/codeql.yml

@@ -8,6 +8,9 @@ on:
   schedule:
     - cron: '0 0 * * 1' # Weekly on Monday
 
+permissions:
+  contents: read
+
 jobs:
   analyze:
     name: Analyze

.github/workflows/conformance.yml

@@ -14,6 +14,9 @@ concurrency:
 env:
   CONFORMANCE_VERSION: "0.2.0-alpha.10"
 
+permissions:
+  contents: read
+
 jobs:
   server:
     runs-on: ubuntu-latest

.github/workflows/stale.yml

@@ -4,6 +4,9 @@ on:
     - cron: "0 0 * * *"
   workflow_dispatch:
 
+permissions:
+  contents: read
+
 jobs:
   stale:
     name: Clean Up