Add explicit permissions to automation workflows

Author: benmcmorran

.github/workflows/fixed-issues.yml

@@ -6,6 +6,9 @@ on:
       - "v[0-9]+.[0-9]+.[0-9]+"
   workflow_dispatch:
 
+permissions:
+  issues: write
+
 jobs:
   fixed:
     runs-on: ubuntu-latest

.github/workflows/remove-labels.yml

@@ -5,6 +5,9 @@ on:
     types:
       - closed
 
+permissions:
+  issues: write
+
 jobs:
   label_issues:
     runs-on: ubuntu-latest

.github/workflows/stale-issues.yml

@@ -5,6 +5,9 @@ on:
     - cron: "0 * * * *"
   workflow_dispatch:
 
+permissions:
+  issues: write
+
 jobs:
   stale:
     runs-on: ubuntu-latest

.github/workflows/triage-issues.yml

@@ -6,6 +6,9 @@ on:
       - opened
       - reopened
 
+permissions:
+  issues: write
+
 jobs:
   label_issues:
     runs-on: ubuntu-latest