ci: use ubuntu-slim runners for short tasks

Author: adil192

.github/workflows/check-flutter-submodule.yml

@@ -12,7 +12,7 @@ on:
 jobs:
   check-flutter-submodule:
     name: Check if the Flutter submodule is up to date
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-slim
     timeout-minutes: 5
     steps:
       - name: Checkout code

.github/workflows/check-rust-version.yml

@@ -12,7 +12,7 @@ on:
 jobs:
   check-rust-version:
     name: Check if the Rust version is up to date
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-slim
     timeout-minutes: 5
     steps:
       - name: Checkout code

.github/workflows/top-issues.yml

@@ -25,7 +25,7 @@ permissions:
 jobs:
   top-issues:
     name: Top issues
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-slim
     steps:
       - name: Run top issues action
         uses: rickstaa/top-issues-action@v1

.github/workflows/update-landing-page.yml

@@ -13,7 +13,7 @@ on:
 
 jobs:
   dispatch:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-slim
     timeout-minutes: 5
     steps:
       - name: Repository Dispatch