fix(ci): add run_id to Figma cache key to allow cache updates

GitHub Actions cache is immutable per key. Adding github.run_id
ensures each build creates a unique cache entry, while restore-keys
prefix matching still picks up the most recent one.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: te6-in

.github/workflows/deploy-seed-design-docs-alpha-pages.yml

@@ -46,7 +46,7 @@ jobs:
         uses: actions/cache/restore@v5
         with:
           path: docs/.cache/figma-image
-          key: ${{ runner.os }}-figma-images-${{ hashFiles('docs/**/*.mdx') }}
+          key: ${{ runner.os }}-figma-images-${{ hashFiles('docs/**/*.mdx') }}-${{ github.run_id }}
           restore-keys: |
             ${{ runner.os }}-figma-images-
 
@@ -77,7 +77,7 @@ jobs:
         uses: actions/cache/save@v5
         with:
           path: docs/.cache/figma-image
-          key: ${{ runner.os }}-figma-images-${{ hashFiles('docs/**/*.mdx') }}
+          key: ${{ runner.os }}-figma-images-${{ hashFiles('docs/**/*.mdx') }}-${{ github.run_id }}
 
       - name: Deploy docs at Cloudflare Pages in `seed-design-v3` project (Alpha)
         id: deploy

.github/workflows/deploy-seed-design-docs-prod-pages.yml

@@ -48,7 +48,7 @@ jobs:
         uses: actions/cache/restore@v5
         with:
           path: docs/.cache/figma-image
-          key: ${{ runner.os }}-figma-images-${{ hashFiles('docs/**/*.mdx') }}
+          key: ${{ runner.os }}-figma-images-${{ hashFiles('docs/**/*.mdx') }}-${{ github.run_id }}
           restore-keys: |
             ${{ runner.os }}-figma-images-
 
@@ -79,7 +79,7 @@ jobs:
         uses: actions/cache/save@v5
         with:
           path: docs/.cache/figma-image
-          key: ${{ runner.os }}-figma-images-${{ hashFiles('docs/**/*.mdx') }}
+          key: ${{ runner.os }}-figma-images-${{ hashFiles('docs/**/*.mdx') }}-${{ github.run_id }}
 
       - name: Deploy docs at Cloudflare Pages in `seed-design-v3` project (Production)
         run: |