Set the chart's placeholder version to 0.1.2

make helm-package passes --version and --app-version from the tag, so
these fields decide nothing about what is published -- but a tree heading
for v0.1.2 that still says 0.1.1 tells its reader something false. Same
as 0e3118d before it.

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: 0.1.1
+version: 0.1.2
-appVersion: "v0.1.1"
+appVersion: "v0.1.2"
 
 keywords:
   - kubernetes