Disable initramfs update and man-db update

Author: dtolnay

.github/workflows/ci.yml

@@ -167,8 +167,12 @@ jobs:
       - run: cargo check --no-default-features --features afl
         working-directory: fuzz
       - uses: dtolnay/install@honggfuzz
-      - run: sudo apt-get update  # https://github.com/actions/runner-images/issues/8953
-      - run: sudo apt-get install binutils-dev libunwind-dev
+      - name: Run apt install binutils-dev libunwind-dev
+        run: |
+          sudo sed -i 's/^update_initramfs=yes$/update_initramfs=no/' /etc/initramfs-tools/update-initramfs.conf
+          sudo rm -f /var/lib/man-db/auto-update
+          sudo apt-get update
+          sudo apt-get install binutils-dev libunwind-dev
       - run: cargo hfuzz build --no-default-features --features honggfuzz
         working-directory: fuzz