switch kubernetes-extra image to version 1.0.2 (#16)

This PR updates the version of the [demo server
image](https://github.com/canonical/api_demo_server/pkgs/container/api_demo_server)
used in the `kubernetes-extra` charm. Version 1.0.2 fixes the bug where
the returned version from the API is different from the image version.

Author: dwilding

.implement/kubernetes-extra.py

@@ -9,7 +9,7 @@ def main():
     r = rewriter.Rewriter('charmcraft.yaml')
     r.fwd(
         prefix='    upstream-source: some-repo/some-image:some-tag',
-        change='    upstream-source: ghcr.io/canonical/api_demo_server:1.0.1',
+        change='    upstream-source: ghcr.io/canonical/api_demo_server:1.0.2',
     )
     r.save()
 
@@ -50,7 +50,7 @@ def main():
         change='# @pytest.mark.skip',
     )
     r.fwd('    assert version', remove_line=True)
-    r.add('    assert version == "1.0.0"  # (Bug) workload ought to return 1.0.1 instead.')
+    r.add('    assert version == "1.0.2"')
     r.save()
 
     # Format the charm code (just in case).

kubernetes-extra/charmcraft.yaml

@@ -64,4 +64,4 @@ resources:
     # used by the 'canonical/charming-actions' GitHub action for automated releases.
     # The test_deploy function in tests/integration/test_charm.py reads upstream-source
     # to determine which OCI image to use when running the charm's integration tests.
-    upstream-source: ghcr.io/canonical/api_demo_server:1.0.1
+    upstream-source: ghcr.io/canonical/api_demo_server:1.0.2

kubernetes-extra/tests/integration/test_charm.py

@@ -31,4 +31,4 @@ def test_deploy(charm: pathlib.Path, juju: jubilant.Juju):
 def test_workload_version_is_set(charm: pathlib.Path, juju: jubilant.Juju):
     """Check that the correct version of the workload is running."""
     version = juju.status().apps["my-application"].version
-    assert version == "1.0.0"  # (Bug) workload ought to return 1.0.1 instead.
+    assert version == "1.0.2"