Add comment justifying why we set cache: false

Author: mbg

.github/workflows/__go-tracing-autobuilder.yml

@@ -7,6 +7,8 @@ steps:
   - uses: actions/setup-go@v5
     with:
       go-version: "~1.22.0"
+      # to avoid potentially misleading autobuilder results where we expect it to download
+      # dependencies successfully, but they actually come from a warm cache
       cache: false
   - uses: ./../action/init
     with:

.github/workflows/__go-tracing-custom-build-steps.yml

@@ -5,6 +5,8 @@ steps:
   - uses: actions/setup-go@v5
     with:
       go-version: "~1.22.0"
+      # to avoid potentially misleading autobuilder results where we expect it to download
+      # dependencies successfully, but they actually come from a warm cache
       cache: false
   - uses: ./../action/init
     with:

.github/workflows/__go-tracing-legacy-workflow.yml

@@ -7,6 +7,8 @@ steps:
   - uses: actions/setup-go@v5
     with:
       go-version: "~1.22.0"
+      # to avoid potentially misleading autobuilder results where we expect it to download
+      # dependencies successfully, but they actually come from a warm cache
       cache: false
   - uses: ./../action/init
     with: