Set the chart's placeholder version to 0.7.1

Cosmetic: make helm-package passes --version and --app-version from the
tag, so these fields decide nothing about what is published. They are kept
in step so the tree heading for v0.7.1 does not say 0.7.0, as in
the 0.7.0 placeholder commit and 295dc3a.

Claude-Session: https://claude.ai/code/session_016mBLURvJoMuUEr9cB2RpUN

charts/terdut-operator/Chart.yaml

@@ -6,8 +6,8 @@ type: application
 # These fields decide nothing: `make helm-package` passes --version and
 # --app-version from the release tag (same reasoning as terdut-server's own
 # chart). They're for whoever reads the tree before a tag exists.
-version: 0.7.0
-appVersion: "v0.7.0"
+version: 0.7.1
+appVersion: "v0.7.1"
 
 keywords:
   - kubernetes

examples/demo/01-server.yaml

@@ -15,7 +15,7 @@ spec:
   image:
     repository: git.ryuvia.com/niklas/terdut-server
     # v0.36.0 is the floor now that replicas below is 2 (this demo pins
-    # the current release, v0.49.1, so it shows the current web UI too): that
+    # the current release, v0.51.0, so it shows the current web UI too): that
     # release put the sweeper, the notifier and the migration runner each
     # behind a Postgres advisory lock, and gave incident creation its own
     # conflict resolution, which is what makes a second replica safe
@@ -24,7 +24,7 @@ spec:
     # can adopt/rotate a key on a team-scoped account it didn't just create
     # in the same call -- without which terdutteam-* can wedge permanently
     # on the crash-window race this demo hit live, niklas/terdut-operator#3.)
-    tag: v0.49.1
+    tag: v0.51.0
   # Matches this CRD's own spec.replicas default (v0.4.0) -- stated
   # explicitly, like every other field in this file, rather than left to
   # the default. RollingUpdate follows automatically; this operator does