Update app versions (batch): tika, gotenberg, synapse, rallly, samba, urlaubsverwaltung, voucher-vault, zipline, teamspeak

Nine non-critical app-version bumps, each with a chart patch bump:

- apache-tika 3.2.3.0-full -> 3.3.1.0-full
- gotenberg 8.26.0 -> 8.36.0
- matrix-synapse v1.149.1 -> v1.159.0
- rallly 4.8.1 -> 4.12.3
- samba 4.23.5 -> 4.23.10
- urlaubsverwaltung 6.5.0 -> 6.7.0
- voucher-vault 1.27.4 -> 1.30.1
- zipline 4.6.4 -> 4.7.0
- teamspeak-server v6.0.0-beta8 -> 6.0.0-beta12.1 (new tag format has no v prefix)

Release notes of every chart were checked for environment-variable
changes; none of the charts needs an env adjustment.

The teamspeak-server install-test is reactivated: beta12.1 ships a
valid default license, so the exclusion is removed, CI fixtures are
added under ci/teamspeak-server/, and the install-test was verified
in a local k3d cluster. README list of excluded charts updated.

ci/teamspeak-server/test-values.yaml

@@ -0,0 +1,6 @@
+# CI install-test values for teamspeak-server: the chart needs no secrets or
+# throwaway infrastructure (no fixtures.yaml), only a storage class that
+# exists in the k3d cluster and a small volume.
+storage:
+  size: 1Gi
+  storageClass: local-path