chore(ci): restrict token permissions (#7470)

Replace read-all with contents:read and add explicit permissions to
follow principle of least privilege.

Signed-off-by: Ville Vesilehto <ville@vesilehto.fi>

.github/workflows/cifuzz.yml

@@ -1,8 +1,13 @@
 name: CIFuzz
+
 on:
   pull_request:
     branches:
       - master
+
+permissions:
+  contents: read
+
 jobs:
   Fuzzing:
     runs-on: ubuntu-latest

.github/workflows/golangci-lint.yml

@@ -1,6 +1,11 @@
 name: golangci-lint
+
 on:
   pull_request:
+
+permissions:
+  contents: read
+
 jobs:
   golangci:
     name: lint

.github/workflows/make.doc.yml

@@ -4,7 +4,8 @@ on:
   schedule:
     - cron: '22 10 * * 0'
 
-permissions: read-all
+permissions:
+  contents: read
 
 jobs:
   fix:

.github/workflows/release.yml

@@ -7,6 +7,9 @@ on:
         description: "Commit (e.g., 52f0348)"
         default: "master"
 
+permissions:
+  contents: read
+
 jobs:
   release:
     name: Release