fix remaining feedback

Signed-off-by: Tim Ramlot <[email protected]>

.spelling

@@ -666,7 +666,6 @@ README.md
 certificate.md
 pageinfo
 md#renew
-upgrade.md
 
 # END TEMPORARY
 

content/docs/contributing/contributing-flow.md

@@ -117,7 +117,7 @@ If this PR introduces a breaking change, the release note block must start with
 ### Cherry Picking
 
 If the pull request contains a critical bug fix then this should be cherry picked in to the current stable cert-manager branch 
-and [released as a patch release](../releases#support-policy).
+and [released as a patch release](../releases/README.md#support-policy).
 
 To trigger the cherry-pick process, add a comment to the GitHub PR.
 For example:

content/docs/contributing/release-process.md

@@ -6,7 +6,7 @@ description: 'cert-manager contributing: Release process'
 This document aims to outline the process that should be followed for
 cutting a new release of cert-manager. If you would like to know more about
 current releases and the timeline for future releases, take a look at the
-[Supported Releases](../releases) page.
+[Supported Releases](../releases/README.md) page.
 
 ## Prerequisites
 
@@ -246,10 +246,10 @@ page if a step is missing or if it is outdated.
    In that PR:
 
    1. (**final release**) Update the section "Supported releases" in the
-     [supported-releases](../releases) page.
+     [supported-releases](../releases/README.md) page.
    2. (**final release**) Update the section "How we determine supported
      Kubernetes versions" on the
-     [supported-releases](../releases) page.
+     [supported-releases](../releases/README.md) page.
    3. (**final release**) Bump the version that appears in
      `scripts/gendocs/generate-new-import-path-docs`. For example: