Fix code scanning warnings in workflows (#2177)

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

.github/workflows/master.yml

@@ -1,5 +1,8 @@
 name: "Master Build, Test & Deploy"
 
+permissions:
+  contents: read
+
 on:
   workflow_dispatch:
   push:
@@ -8,6 +11,8 @@ on:
 
 jobs:
   main:
+    permissions:
+      contents: write
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6

.github/workflows/pull_requests.yml

@@ -1,5 +1,8 @@
 name: "Pull Requests"
 
+permissions:
+  contents: read
+
 on:
   workflow_dispatch:
   pull_request: