chore(deps): pin dependencies (#1162)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

.github/workflows/helm-chart.yml

@@ -61,7 +61,7 @@ jobs:
     permissions:
       contents: read
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
         with:
           # On chart-tag rescue dispatch, lint/render the tagged commit that the
           # publish job will package, not whatever `main` is when the dispatch
@@ -78,7 +78,7 @@ jobs:
         run: helm plugin install --version 0.8.2 https://github.com/helm-unittest/helm-unittest
 
       - name: Set up Python (for chart-testing)
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5
         with:
           python-version: "3.12"
 
@@ -118,7 +118,7 @@ jobs:
     permissions:
       contents: read
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
         with:
           fetch-depth: 0
 
@@ -128,7 +128,7 @@ jobs:
           version: v3.16.4
 
       - name: Set up Python (for chart-testing)
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5
         with:
           python-version: "3.12"
 
@@ -165,7 +165,7 @@ jobs:
       packages: write    # push the chart to GHCR
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
         with:
           # On the rescue dispatch, build the tagged commit (github.ref is
           # `main` there); on a tag push, the default ref is already the tag.