test.yml: include matrix.template in the cache key.

Currently, caching is not very effective in the Integration Tests.
By breaking down the cache key into finer details, the cache should become more effective.

Signed-off-by: Norio Nomura <norio.nomura@gmail.com>

test.yml: `hashFiles` does not support path including `..`

Signed-off-by: Norio Nomura <norio.nomura@gmail.com>

realpath on macOS does not support --relative-to= option.

Signed-off-by: Norio Nomura <norio.nomura@gmail.com>

silence `yamllint` warning `too few spaces before comment`

Signed-off-by: Norio Nomura <norio.nomura@gmail.com>

Author: norio-nomura

.github/workflows/test.yml

@@ -162,7 +162,7 @@ jobs:
       with:
         path: ~/Library/Caches/lima/download
         # hashFiles do not seem to support symlinks
-        key: ${{ runner.os }}-${{ hashFiles('examples/*.yaml') }}
+        key: ${{ runner.os }}-${{ hashFiles('templates/default.yaml') }}
     - name: Unit tests
       run: go test -v ./...
     - name: Make
@@ -225,12 +225,15 @@ jobs:
     - uses: actions/setup-go@v5
       with:
         go-version: 1.22.x
+    - id: path_for_hashFiles
+      # It seems that `hashFiles` cannot use `..` as a path component, so generate a normalized path here.
+      run: echo "NORMALIZED=$(realpath --relative-to=$PWD examples/${{ matrix.template }})" >> "$GITHUB_OUTPUT"
     - uses: actions/cache@v4
       with:
         path: ~/.cache/lima/download
         # hashFiles do not seem to support symlinks
         # TODO: more fine-grained cache
-        key: ${{ runner.os }}-${{ hashFiles('examples/*.yaml') }}
+        key: ${{ runner.os }}-${{ hashFiles(steps.path_for_hashFiles.outputs.NORMALIZED) }}
     - name: Make
       run: make
     - name: Install
@@ -401,12 +404,15 @@ jobs:
     - uses: actions/setup-go@v5
       with:
         go-version: 1.22.x
+    - id: path_for_hashFiles
+      # It seems that `hashFiles` cannot use `..` as a path component, so generate a normalized path here.
+      run: echo "NORMALIZED=$(realpath examples/${{ matrix.template }})" >> "$GITHUB_OUTPUT"
     - name: Cache ~/Library/Caches/lima/download
       uses: actions/cache@v4
       with:
         path: ~/Library/Caches/lima/download
         # hashFiles do not seem to support symlinks
-        key: ${{ runner.os }}-${{ hashFiles('examples/*.yaml') }}
+        key: ${{ runner.os }}-${{ hashFiles(steps.path_for_hashFiles.outputs.NORMALIZED) }}
     - name: Make
       run: make
     - name: Install