ci: refresh the apt package lists before installing packages

The build workflow failed in build-MGARD's first step, `sudo apt-get install
...`, with exit code 100, before the code was checked out; the same step
passed on master on 2026-10-14. The usual cause is stale package lists:
hosted runners ship with the lists from when the image was built, and the
mirror drops package versions that have since been superseded. Run
`apt-get update` first in every job that installs packages, as GitHub
recommends for its hosted runners.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Author: 2 people

.github/workflows/build.yml

@@ -17,7 +17,7 @@ jobs:
         build-MOAB:
                 runs-on: ubuntu-24.04
                 steps:
-                        - run: sudo apt-get install mpich libmpich-dev liblapack-dev
+                        - run: sudo apt-get update && sudo apt-get install mpich libmpich-dev liblapack-dev
                         - name: cache-MOAB
                           id: cache-MOAB
                           uses: actions/cache@v4
@@ -97,7 +97,7 @@ jobs:
                 needs: [build-MOAB, build-Catch2, build-TCLAP, build-ZSTD]
                 runs-on: ubuntu-24.04
                 steps:
-                        - run: sudo apt-get install mpich doxygen libmpich-dev liblapack-dev libzstd1 libzstd-dev libtclap-dev protobuf-compiler libprotobuf-dev
+                        - run: sudo apt-get update && sudo apt-get install mpich doxygen libmpich-dev liblapack-dev libzstd1 libzstd-dev libtclap-dev protobuf-compiler libprotobuf-dev
                         - name: checkout
                           uses: actions/checkout@v4
                         - name: fetch-MOAB

.github/workflows/format.yml

@@ -7,7 +7,7 @@ jobs:
         clang-format:
                 runs-on: ubuntu-22.04
                 steps:
-                        - run: sudo apt-get install clang-format
+                        - run: sudo apt-get update && sudo apt-get install clang-format
                         - uses: actions/checkout@v2.3.4
                           with:
                                   repository: Sarcasm/run-clang-format