ci: apt update (#7596)

Author: d-a-v

Diff for: .github/workflows/pull-request.yml

@@ -154,7 +154,8 @@ jobs:
         mod: 42 # Picked at random to give 4-5 builds and exit.
         rem: 13
       run: |
-        sudo apt-get install python3-pip python3-setuptools
+        sudo apt update
+        sudo apt install python3-pip python3-setuptools
         PATH=/home/runner/.local/bin:$PATH bash ./tests/platformio.sh
 
 
@@ -174,7 +175,8 @@ jobs:
         TRAVIS_BUILD_DIR: ${{ github.workspace }}
         TRAVIS_TAG: ${{ github.ref }}
       run: |
-        sudo apt-get install valgrind lcov
+        sudo apt update
+        sudo apt install valgrind lcov
         bash ./tests/ci/host_test.sh
 
 
@@ -194,7 +196,8 @@ jobs:
         TRAVIS_BUILD_DIR: ${{ github.workspace }}
         TRAVIS_TAG: ${{ github.ref }}
       run: |
-        sudo apt-get install python3-pip python3-setuptools
+        sudo apt update
+        sudo apt install python3-pip python3-setuptools
         # GitHub CI installs pip3 and setuptools outside the path.
         # Update the path to include them and run.
         PATH=/home/runner/.local/bin:$PATH pip3 install --user -r doc/requirements.txt
@@ -217,7 +220,8 @@ jobs:
         TRAVIS_BUILD_DIR: ${{ github.workspace }}
         TRAVIS_TAG: ${{ github.ref }}
       run: |
-          sudo apt-get install astyle
+          sudo apt update
+          sudo apt install astyle
           bash ./tests/ci/style_check.sh