Bump slackapi/slack-github-action from 1.16.0 to 2.0.0

Bumps [slackapi/slack-github-action](https://github.com/slackapi/slack-github-action) from 1.16.0 to 2.0.0.
- [Release notes](https://github.com/slackapi/slack-github-action/releases)
- [Commits](slackapi/slack-github-action@v1.16.0...v2.0.0)

---
updated-dependencies:
- dependency-name: slackapi/slack-github-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/app-manager-release-notes.yml

@@ -55,7 +55,7 @@ jobs:
         echo "Pull Request URL - ${{ steps.cpr.outputs.pull-request-url }}"
 
     - name: Slack Notification
-      uses: slackapi/slack-github-action@v1.16.0
+      uses: slackapi/slack-github-action@v2.0.0
       with: 
         payload: |
           {

.github/workflows/kubernetes-installer-release-notes.yml

@@ -55,7 +55,7 @@ jobs:
         echo "Pull Request URL - ${{ steps.cpr.outputs.pull-request-url }}"
 
     - name: Slack Notification
-      uses: slackapi/slack-github-action@v1.16.0
+      uses: slackapi/slack-github-action@v2.0.0
       with: 
         payload: |
           {

.github/workflows/replicated-sdk-release-notes.yml

@@ -59,7 +59,7 @@ jobs:
         echo "Pull Request URL - ${{ steps.cpr.outputs.pull-request-url }}"
 
     - name: Slack Notification
-      uses: slackapi/slack-github-action@v1.16.0
+      uses: slackapi/slack-github-action@v2.0.0
       with: 
         payload: |
           {

.github/workflows/vendor-portal-release-notes.yml

@@ -62,7 +62,7 @@ jobs:
           echo "Pull Request URL - ${{ steps.cpr.outputs.pull-request-url }}"
 
       - name: Slack Notification
-        uses: slackapi/slack-github-action@v1.16.0
+        uses: slackapi/slack-github-action@v2.0.0
         with:
           payload: |
             {