Updates slackapi/slack-github-action and pins to af78098f536edbc4de71162a307590698245be95

Updates slackapi/slack-github-action from v1.26.0 to v3.0.1 and pins to a specific commit hash instead of the tag.

Author: Alex-Welsh

.github/workflows/overcloud-host-image-build.yml

@@ -502,7 +502,7 @@ jobs:
         if: inputs.create_skc_pr
 
       - name: Send message to Slack via Workflow Builder
-        uses: slackapi/slack-github-action@v1.26.0
+        uses: slackapi/slack-github-action@af78098f536edbc4de71162a307590698245be95 # v3.0.1
         with:
           payload: |
             {

.github/workflows/stackhpc-build-kayobe-image.yml

@@ -101,7 +101,7 @@ jobs:
           labels: ${{ steps.meta.outputs.labels }}
 
       - name: Send message to Slack via Workflow Builder
-        uses: slackapi/slack-github-action@v1.26.0
+        uses: slackapi/slack-github-action@af78098f536edbc4de71162a307590698245be95 # v3.0.1
         with:
           payload: |
             {

.github/workflows/stackhpc-ci-cleanup.yml

@@ -121,7 +121,7 @@ jobs:
           OS_APPLICATION_CREDENTIAL_SECRET: ${{ secrets.OS_APPLICATION_CREDENTIAL_SECRET }}
 
       - name: Send message to Slack via Workflow Builder
-        uses: slackapi/slack-github-action@v1.26.0
+        uses: slackapi/slack-github-action@af78098f536edbc4de71162a307590698245be95 # v3.0.1
         with:
           payload: |
             {

.github/workflows/stackhpc-promote.yml

@@ -60,7 +60,7 @@ jobs:
           echo "::notice Overcloud host image promote workflow: https://github.com/stackhpc/stackhpc-kayobe-config/actions/workflows/overcloud-host-image-promote.yml"
 
       - name: Send message to Slack via Workflow Builder
-        uses: slackapi/slack-github-action@v1.26.0
+        uses: slackapi/slack-github-action@af78098f536edbc4de71162a307590698245be95 # v3.0.1
         with:
           payload: |
             {