ci: update pull requests workflow

Author: vplasencia

.github/workflows/pull-requests.yml

@@ -22,6 +22,9 @@ jobs:
             - name: Install dependencies
               run: yarn
 
+            - name: Install build tools
+              run: sudo apt-get update && sudo apt-get install -y build-essential
+
             - name: Get changed files
               id: changed-files
               uses: tj-actions/changed-files@v44
@@ -135,7 +138,6 @@ jobs:
             - if: steps.changed-files.outputs.subgraph_any_changed == 'true'
               name: Build and Test Subgraph
               run: |
-                  sudo apt-get update && sudo apt-get install -y libssl1.1
                   yarn workspace @semaphore-protocol/utils build
                   yarn build:subgraph
                   yarn test:subgraph