ci: run apt-get update before install

Make sure sources are up-to-date before installing any package. This is
causing failures on some workflows.

Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>

.github/workflows/codecov.yaml

@@ -149,6 +149,7 @@ jobs:
 
       - name: Merge coverage files
         run: |
+          sudo apt-get update
           sudo apt-get install -y lcov
           cd ./coverage/reports
           lcov ${{ steps.get-coverage-files.outputs.mergefiles }} -o merged.info --rc lcov_branch_coverage=1

.github/workflows/coding_guidelines.yml

@@ -27,6 +27,7 @@ jobs:
 
     - name: Install Packages
       run: |
+        sudo apt-get update
         sudo apt-get install ocaml-base-nox
         wget https://launchpad.net/~npalix/+archive/ubuntu/coccinelle/+files/coccinelle_1.0.8~20.04npalix1_amd64.deb
         sudo dpkg -i coccinelle_1.0.8~20.04npalix1_amd64.deb

.github/workflows/issue_count.yml

@@ -24,6 +24,7 @@ jobs:
 
     - name: install-packages
       run: |
+        sudo apt-get update
         sudo apt-get install discount
 
     - uses: brcrista/summarize-issues@v3