fix(app): Properly detects release notes added after a release when upgrading an app (#523)

Fixes toolshed/abra#488

Reviewed-on: toolshed/abra#523
Reviewed-by: decentral1se <decentral1se@noreply.git.coopcloud.tech>
Co-authored-by: p4u1 <p4u1_f4u1@riseup.net>
Co-committed-by: p4u1 <p4u1_f4u1@riseup.net>

tests/integration/app_upgrade.bats

@@ -204,6 +204,18 @@ teardown(){
   assert_output --partial 'release notes baz' # 0.2.0+1.21.0
 }
 
+# bats test_tags=slow
+@test "show release note added after release" {
+  run $ABRA app deploy "$TEST_APP_DOMAIN" "0.2.0+1.21.0" --no-input --no-converge-checks
+  assert_success
+  assert_output --partial '0.2.0+1.21.0'
+
+  run $ABRA app upgrade "$TEST_APP_DOMAIN" "0.3.0+1.21.0" --no-input --no-converge-checks
+  assert_success
+  assert_output --partial '0.3.0+1.21.0'
+  assert_output --partial 'A release note added after the release'
+}
+
 # bats test_tags=slow
 @test "upgrade commit deployment not possible" {
   tagHash=$(_get_tag_hash "0.1.0+1.20.0")