ci: Update runner type for workflows

- Change "runs-on" to "ubuntu-latest" in build-test.yml
- Change "runs-on" to "ubuntu-latest" in linters.yml

Signed-off-by: xieyt <alokmilenium@gmail.com>

Author: Xieyt

.github/workflows/build-test.yml

@@ -9,7 +9,7 @@ concurrency:
 
 jobs:
   Bench-Build-Test:
-    runs-on: self-hosted
+    runs-on: ubuntu-latest
     container:
       image: docker.io/frappe/bench:latest
       options: --user root
@@ -55,4 +55,4 @@ jobs:
 
       - name: Cleanup
         if: ${{ always() }}
-        uses: rtCamp/action-cleanup@master
+        uses: rtCamp/action-cleanup@master

.github/workflows/linters.yml

@@ -13,7 +13,7 @@ concurrency:
 jobs:
   pre-commit:
     name: "Frappe Linter"
-    runs-on: self-hosted
+    runs-on: ubuntu-latest
     container:
       image: alpine:latest # latest used here for simplicity, not recommended
     defaults: