ci: add explicit permissions to workflows

.github/workflows/build.yml

@@ -6,6 +6,9 @@ on:
   push:
     branches: [main]
 
+permissions:
+  contents: read
+
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true

.github/workflows/create-release.yml

@@ -5,6 +5,9 @@ on:
     tags:
     - 'v*' # Push events to matching v*, i.e. v1.0, v20.15.10
 
+permissions:
+  contents: write
+
 jobs:
   create-release:
     runs-on: ubuntu-latest

.github/workflows/crowdin.yml

@@ -5,6 +5,10 @@ on:
     # paths: ["app/src/main/res/**/strings.xml"] // removes filter to allow downloads at any moment.
     branches: [ main ]
 
+permissions:
+  contents: write
+  pull-requests: write
+
 jobs:
   synchronize-with-crowdin:
     runs-on: ubuntu-latest