chore: pin and update all workflow dependencies; add permission scopes (#2138)

---------

Signed-off-by: Christopher Phillips <christopher.phillips@anchore.com>

.github/workflows/benchmark-testing.yaml

@@ -4,6 +4,9 @@ on:
   workflow_dispatch:
   pull_request:
 
+permissions:
+  contents: read
+
 jobs:
 
   Benchmark-Test:
@@ -13,13 +16,14 @@ jobs:
     # we also want to run on push such that merges to main are recorded to the cache. For this reason we don't filter
     # the job by event.
     steps:
-      - uses: actions/checkout@v4
+      - name: Checkout code
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4.0.0
 
       - name: Bootstrap environment
         uses: ./.github/actions/bootstrap
 
       - name: Restore base benchmark result
-        uses: actions/cache@v3
+        uses: actions/cache@704facf57e6136b1bc63b828d79edcd491f0ee84 #v3.3.2
         with:
           path: test/results/benchmark-main.txt
           # use base sha for PR or new commit hash for main push in benchmark result key
@@ -35,13 +39,13 @@ jobs:
           OUTPUT="${OUTPUT//$'\r'/'%0D'}" # URL encode all '\r' characters
           echo "result=$OUTPUT" >> $GITHUB_OUTPUT
 
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@a8a3f3ad30e3422c9c7b888a15615d19a852ae32 # v3.1.3
         with:
           name: benchmark-test-results
           path: test/results/**/*
 
       - name: Update PR benchmark results comment
-        uses: marocchino/sticky-pull-request-comment@v2
+        uses: marocchino/sticky-pull-request-comment@efaaab3fd41a9c3de579aba759d2552635e590fd #v2.8.0
         continue-on-error: true
         with:
           header: benchmark