Stop relying on githack URLs (#4956)

This replaces all githack URLs, relied upon by our GitHub Actions and
Netlify processes, with raw.githubusercontent.com URLs.

It seems that githack may have recently implemented an extra
confirmation step before rendering documents; it's framed as end-user
protection, but I have to imagine it might help alleviate load for them
from bots as well.

spec-generator already has additional logic specifically to support
raw.githubusercontent.com URLs when used with ReSpec, so switching these
does not present a problem.

I tested each replaced URL locally. (`/refs/heads/` is only included
when referencing a branch, not a specific commit.)

Author: kfranqueiro

.github/workflows/11ty-publish.yaml

@@ -32,9 +32,8 @@ jobs:
           npm i
           npm run build
           cp guidelines/guidelines.css guidelines/relative-luminance.html _site/guidelines/22
-          curl https://www.w3.org/publications/spec-generator/?type=respec"&"url=https://raw.githack.com/$GITHUB_REPOSITORY/main/guidelines/index.html -o _site/guidelines/22/index.html -f  --retry 3
-          curl https://www.w3.org/publications/spec-generator/?type=respec"&"url=https://raw.githack.com/$GITHUB_REPOSITORY/main/requirements/22/index.html -o _site/requirements/22/index.html -f  --retry 3
-          curl https://www.w3.org/publications/spec-generator/?type=respec"&"url=https://raw.githack.com/$GITHUB_REPOSITORY/main/conformance-challenges/index.html -o _site/conformance-challenges/index.html -f  --retry 3
+          curl https://www.w3.org/publications/spec-generator/?type=respec"&"url=https://raw.githubusercontent.com/$GITHUB_REPOSITORY/refs/heads/main/guidelines/index.html -o _site/guidelines/22/index.html -f  --retry 3
+          curl https://www.w3.org/publications/spec-generator/?type=respec"&"url=https://raw.githubusercontent.com/$GITHUB_REPOSITORY/refs/heads/main/requirements/22/index.html -o _site/requirements/22/index.html -f  --retry 3
       - name: Push
         uses: stefanzweifel/git-auto-commit-action@v5
         with:

eleventy.config.ts

@@ -236,7 +236,7 @@ export default async function (eleventyConfig: any) {
         join(dir.output, "guidelines", "relative-luminance.html")
       );
 
-      const url = `https://raw.githack.com/${GH_ORG}/${GH_REPO}/${sha}/guidelines/index.html?isPreview=true`;
+      const url = `https://raw.githubusercontent.com/${GH_ORG}/${GH_REPO}/${sha}/guidelines/index.html?isPreview=true`;
       const processedGuidelines = await fetchText(
         `https://www.w3.org/publications/spec-generator/?type=respec&url=${encodeURIComponent(url)}`
       );