fix: install lcov system dep for coverage report in CI

Author: Komal362000

.github/workflows/deploy_docs.yml

@@ -46,7 +46,7 @@ jobs:
       - name: Install system dependencies
         run: |
           sudo apt-get update
-          sudo apt-get install -y pkg-config libcairo2-dev
+          sudo apt-get install -y pkg-config libcairo2-dev lcov
       - name: Determine version
         id: version
         run: |

.github/workflows/tests.yml

@@ -68,6 +68,10 @@ jobs:
           disk-cache: true
           repository-cache: true
           bazelisk-cache: true
+      - name: Install lcov
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y lcov
       - name: Generate combined coverage report
         run: bazel run //coverage:combined_report -- --out-dir coverage-html
       - name: Upload coverage report artifact