Update github workflows

Generated by renovateBot

Author: renovate[bot]

.github/workflows/docker.yaml

@@ -58,7 +58,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@b7ad1dad31e06c5925ef5d2fc7ad053ef454303e # v7
         with:
-          go-version: "1.25"
+          go-version: "1.26"
 
       - name: Download Go modules
         run: go mod download

.github/workflows/slack-notifier.yaml

@@ -19,7 +19,7 @@ jobs:
   notify-devs:
     runs-on: ubuntu-latest
     steps:
-      - uses: livekit/slack-notifier-action@main
+      - uses: livekit/slack-notifier-action@34d9e973391fe5e4afacba015c4d144eb912e7ea # main
         with:
           config_json: ${{ secrets.SLACK_NOTIFY_CONFIG_JSON }}
           slack_token: ${{ secrets.SLACK_PR_NOTIFIER_TOKEN }}