docs: update actions and workflows documentation

[skip ci]

Signed-off-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: github-actions[bot]

actions/helm/test-chart/README.md

@@ -16,7 +16,8 @@
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-Action to test a Helm chart. Mainly using [helm/chart-testing-action](https://github.com/helm/chart-testing-action)
+Action to lint and test installing some Helm chart(s).
+Mainly using [helm/chart-testing-action](https://github.com/helm/chart-testing-action).
 
 <!-- end description -->
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@@ -59,17 +60,22 @@ Action to test a Helm chart. Mainly using [helm/chart-testing-action](https://gi
     # Default: ${{ github.token }}
     oci-registry-password: ""
 
+    # Description: Only run lint and tests on changed charts.
+    #
+    # Default: true
+    check-diff-only: ""
+
     # Description: Enable linting of the Helm chart. See
     # <https://github.com/helm/chart-testing/blob/main/doc/ct_lint.md>.
     #
     # Default: true
     enable-lint: ""
 
-    # Description: Enable testing of the Helm chart. See
+    # Description: Enable installing the Helm chart. See
     # <https://github.com/helm/chart-testing/blob/main/doc/ct_install.md>.
     #
     # Default: true
-    enable-test: ""
+    enable-install: ""
 ```
 
 <!-- end usage -->
@@ -83,8 +89,9 @@ Action to test a Helm chart. Mainly using [helm/chart-testing-action](https://gi
 | <code>oci-registry</code>          | OCI registry where to pull and push images                                                                                                                                           | <code>ghcr.io</code>                        | **false**    |
 | <code>oci-registry-username</code> | Username used to log against the OCI registry.<br />See <https://github.com/docker/login-action#usage>.                                                                              | <code>${{ github.repository_owner }}</code> | **false**    |
 | <code>oci-registry-password</code> | Password or personal access token used to log against the OCI registry.<br />Can be passed in using "secrets.GITHUB_TOKEN".<br />See <https://github.com/docker/login-action#usage>. | <code>${{ github.token }}</code>            | **false**    |
+| <code>check-diff-only</code>       | Only run lint and tests on changed charts.                                                                                                                                           | <code>true</code>                           | **false**    |
 | <code>enable-lint</code>           | Enable linting of the Helm chart.<br />See <https://github.com/helm/chart-testing/blob/main/doc/ct_lint.md>.                                                                         | <code>true</code>                           | **false**    |
-| <code>enable-test</code>           | Enable testing of the Helm chart.<br />See <https://github.com/helm/chart-testing/blob/main/doc/ct_install.md>.                                                                      | <code>true</code>                           | **false**    |
+| <code>enable-install</code>        | Enable installing the Helm chart.<br />See <https://github.com/helm/chart-testing/blob/main/doc/ct_install.md>.                                                                      | <code>true</code>                           | **false**    |
 
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