switch install instructions to use bookworm by default (team#41244)

howto/ganeti.md

@@ -48,7 +48,7 @@ vocabulary with 10G root, 512M swap, 20G spare on SSD, 800G on HDD, 8GB
 ram and 2 CPU cores:
 
     gnt-instance add \
-      -o debootstrap+bullseye \
+      -o debootstrap+bookworm \
       -t drbd --no-wait-for-sync \
       --net 0:ip=pool,network=gnt-fsn13-02 \
       --no-ip-check \
@@ -123,7 +123,7 @@ Then follow [howto/new-machine](howto/new-machine).
 This is a typical server creation in the `gnt-chi` cluster:
 
     gnt-instance add \
-      -o debootstrap+bullseye \
+      -o debootstrap+bookworm \
       -t drbd --no-wait-for-sync \
       --net 0:ip=pool,network=gnt-chi-01 \
       --no-ip-check \
@@ -137,7 +137,7 @@ A simple test machine, with only 1G of disk, ram, and 1 CPU, without
 DRBD, in the FSN cluster:
 
     gnt-instance add \
-          -o debootstrap+bullseye \
+          -o debootstrap+bookworm \
           -t plain --no-wait-for-sync \
           --net 0:ip=pool,network=gnt-fsn13-02 \
           --no-ip-check \
@@ -151,7 +151,7 @@ Do not forget to follow the [next steps](#next-steps), above.
 A test server in `gnt-dal`:
 
     gnt-instance add \
-      -o debootstrap+bullseye \
+      -o debootstrap+bookworm \
       -t drbd --no-wait-for-sync \
       --net 0:ip=pool,network=gnt-dal-01 \
       --no-ip-check \
@@ -197,7 +197,7 @@ the [storage servers documentation](howto/new-machine-cymru#storage-servers) for
 
         gnt-instance add \
               -n chi-node-01.torproject.org \
-              -o debootstrap+bullseye \
+              -o debootstrap+bookworm \
               -t blockdev --no-wait-for-sync \
               --net 0:ip=pool,network=gnt-chi-01 \
               --no-ip-check \

howto/new-machine-hetzner-robot.md

@@ -204,7 +204,7 @@ which we'll use below.
             --grub "$BOOT_DISK" \
             --target /target \
             --hostname `hostname` \
-            --release bullseye \
+            --release bookworm \
             --mirror https://mirror.hetzner.de/debian/packages/ \
             --packages /root/tsa-misc/installer/packages \
             --post-scripts /root/tsa-misc/installer/post-scripts/ \