chore: add missing release notes (keptn#5781)

releasenotes/releasenotes_V0.9.1.md

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+# Release Notes 0.9.1
+
+
+This is a bug fix release for Keptn 0.9.0, containing fixes for the Bridge and Keptn core services; especially, lighthouse-service and shipyard-controller.
+
+---
+
+## Improvements and Fixes
+
+<details><summary>Platform Support / Installer</summary>
+<p>
+
+- *Fixes:*
+  * mongodb and mongodb-datastore killed because of OOM [#5196](https://github.com/keptn/keptn/issues/5196)
+
+</p>
+</details>
+
+
+</p>
+</details>
+
+<details><summary>Keptn Core</summary>
+<p>
+
+- *Fixes:*
+  * *lighthouse-service*: Print logs if configure monitoring fails [#5088](https://github.com/keptn/keptn/issues/5088)
+  * *lighthouse-service*: No error message when SLO parsing failed [#5130](https://github.com/keptn/keptn/issues/5130)
+  * *lighthouse-service*: Error events from the lighthouse-service are shown even though "status": "succeeded" [#5170](https://github.com/keptn/keptn/issues/5170)
+  * *shipyard-controller*: Returns a 500 error if a triggered event is not found [#5132](https://github.com/keptn/keptn/issues/5132)
+  * *shipyard-controller*: Every 10 seconds an error is produced with "could not load queued sequences" [#5138](https://github.com/keptn/keptn/issues/5138)
+  * *configuration-service*: deleting a file on a specific stage or for specific service not possible [#5136](https://github.com/keptn/keptn/issues/5136)
+  * Providing an invalid git token disables the access to the repository [#5064](https://github.com/keptn/keptn/issues/5064)
+  * Unable to (re)register to Keptn [#4791](https://github.com/keptn/keptn/issues/4791)
+
+
+</p>
+</details>
+
+<details><summary>Bridge</summary>
+<p>
+
+- *Fixes:*
+  * Bridge not grouping paused sequences correctly [#5154](https://github.com/keptn/keptn/issues/5154)
+  * Sequence screen does not get updated on project change if no sequence was triggered for a project [#5085](https://github.com/keptn/keptn/issues/5085)
+  * A failed sequence is shown as it would be running and cannot be aborted [#5137](https://github.com/keptn/keptn/issues/5137)
+  * Bridge runs into some errors if a sequence for a service could not be found [#5172](https://github.com/keptn/keptn/issues/5172)
+  * Project delete dialog is not closed [#5091](https://github.com/keptn/keptn/issues/5091)
+  * Polling of a project does not stop [#5094](https://github.com/keptn/keptn/issues/5094)
+  * Unread error event indicator for integrations is shown even if there aren't any [#5118](https://github.com/keptn/keptn/issues/5118)
+  * Dashboard: Redirect after click on a service or a sequence does not work [#5126](https://github.com/keptn/keptn/issues/5126)
+  * If 401 for API token request is returned, endless redirect loop occurs [#5086](https://github.com/keptn/keptn/issues/5086)
+  * Sequence is not displayed correctly if more than 100 events exist [#5056](https://github.com/keptn/keptn/issues/5056)
+
+</p>
+</details>
+
+## Upgrade to 0.9.1
+
+- The upgrade from 0.9.0 to 0.9.1 is supported by the `keptn upgrade` command. Find the documentation here: [Upgrade from Keptn 0.9.0 to 0.9.1](https://keptn.sh/docs/0.9.x/operate/upgrade/#upgrade-from-keptn-0-9-0-to-0-9-1).

releasenotes/releasenotes_V0.9.2.md

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+# Release Notes 0.9.2
+
+This is a hotfix release for Keptn 0.9.1, containing a fix for the OAuth integration in the Bridge. 
+
+---
+
+## Fixes
+
+- Bridge does not redirect to login if OAuth is enabled  [#5370](https://github.com/keptn/keptn/issues/5370)
+
+## Upgrade to 0.9.2
+
+- The upgrade from 0.9.1 to 0.9.2 is supported by the `keptn upgrade` command. Find the documentation here: [Upgrade from Keptn 0.9.1 to 0.9.2](https://keptn.sh/docs/0.9.x/operate/upgrade/#upgrade-from-keptn-0-9-1-to-0-9-2).