Bump nick-fields/retry from 2.4.0 to 2.6.0 (2i2c-org#1214)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/deploy-hubs.yaml

@@ -163,7 +163,7 @@ jobs:
       # Retry action: https://github.com/marketplace/actions/retry-step
       - name: Run health check for staging hub on cluster ${{ matrix.jobs.cluster_name }}
         if: matrix.jobs.upgrade_staging
-        uses: nick-fields/retry@v2.4.0
+        uses: nick-fields/retry@v2.6.0
         with:
           timeout_minutes: 10
           max_attempts: 2
@@ -178,7 +178,7 @@ jobs:
       # Retry action: https://github.com/marketplace/actions/retry-step
       - name: Run health check for dask-staging hub on cluster ${{ matrix.jobs.cluster_name }} if it exists
         if: matrix.jobs.upgrade_staging && matrix.jobs.cluster_name == '2i2c'
-        uses: nick-fields/retry@v2.4.0
+        uses: nick-fields/retry@v2.6.0
         with:
           timeout_minutes: 10
           max_attempts: 2
@@ -277,7 +277,7 @@ jobs:
 
       # Retry action: https://github.com/marketplace/actions/retry-step
       - name: Run health check against ${{ matrix.jobs.hub_name }} hub on cluster ${{ matrix.jobs.cluster_name}}
-        uses: nick-fields/retry@v2.4.0
+        uses: nick-fields/retry@v2.6.0
         with:
           timeout_minutes: 10
           max_attempts: 3