scripts/installer.sh: set Deepin to a debian version

Deepin Linux 20.x reports its version as "apricot"
Set it to bullseye, the Debian version it corresponds to.

Also fix the installer CI: OpenSUSE Leap appears to have removed
curl from the base image recently, we have to install it now.

Fixes https://github.com/tailscale/tailscale/issues/8850
Updates https://github.com/tailscale/tailscale/issues/7862
Updates https://github.com/tailscale/corp/issues/8952

Signed-off-by: Denton Gentry <dgentry@tailscale.com>

.github/workflows/installer.yml

@@ -78,7 +78,7 @@ jobs:
         || contains(matrix.image, 'amazonlinux')
     - name: install dependencies (zypper)
       # tar and gzip are needed by the actions/checkout below.
-      run: zypper --non-interactive install tar gzip
+      run: zypper --non-interactive install tar gzip ${{ matrix.deps }}
       if: contains(matrix.image, 'opensuse')
     - name: install dependencies (apt-get)
       run: |