Remove node version from matrix

.github/workflows/build.yml

@@ -12,23 +12,23 @@ on:
 permissions:
   contents: read
 
+env:
+  node-version: 18.x
+
 jobs:
   build-mermaid:
     runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        node-version: [18.x]
     steps:
       - uses: actions/checkout@v4
 
       - uses: pnpm/action-setup@v2
         # uses version from "packageManager" field in package.json
 
-      - name: Setup Node.js ${{ matrix.node-version }}
+      - name: Setup Node.js ${{ env.node-version }}
         uses: actions/setup-node@v4
         with:
           cache: pnpm
-          node-version: ${{ matrix.node-version }}
+          node-version: ${{ env.node-version }}
 
       - name: Install Packages
         run: |

.github/workflows/e2e.yml

@@ -17,6 +17,7 @@ permissions:
   contents: read
 
 env:
+  node-version: 18.x
   # For PRs and MergeQueues, the target commit is used, and for push events, github.event.previous is used.
   targetHash: ${{ github.event.pull_request.base.sha || github.event.merge_group.base_sha || (github.event.before == '0000000000000000000000000000000000000000' && 'develop' || github.event.before)  }}
 
@@ -60,18 +61,17 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node-version: [18.x]
         containers: [1, 2, 3, 4]
     steps:
       - uses: actions/checkout@v4
 
       - uses: pnpm/action-setup@v2
         # uses version from "packageManager" field in package.json
 
-      - name: Setup Node.js ${{ matrix.node-version }}
+      - name: Setup Node.js ${{ env.node-version }}
         uses: actions/setup-node@v4
         with:
-          node-version: ${{ matrix.node-version }}
+          node-version: ${{ env.node-version }}
 
       # These cached snapshots are downloaded, providing the reference snapshots.
       - name: Cache snapshots

.github/workflows/lint.yml

@@ -13,23 +13,23 @@ on:
 permissions:
   contents: write
 
+env:
+  node-version: 18.x
+
 jobs:
   lint:
     runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        node-version: [18.x]
     steps:
       - uses: actions/checkout@v4
 
       - uses: pnpm/action-setup@v2
         # uses version from "packageManager" field in package.json
 
-      - name: Setup Node.js ${{ matrix.node-version }}
+      - name: Setup Node.js ${{ env.node-version }}
         uses: actions/setup-node@v4
         with:
           cache: pnpm
-          node-version: ${{ matrix.node-version }}
+          node-version: ${{ env.node-version }}
 
       - name: Install Packages
         run: |

.github/workflows/test.yml

@@ -5,23 +5,23 @@ on: [push, pull_request, merge_group]
 permissions:
   contents: read
 
+env:
+  node-version: 18.x
+
 jobs:
   unit-test:
     runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        node-version: [18.x]
     steps:
       - uses: actions/checkout@v4
 
       - uses: pnpm/action-setup@v2
         # uses version from "packageManager" field in package.json
 
-      - name: Setup Node.js ${{ matrix.node-version }}
+      - name: Setup Node.js ${{ env.node-version }}
         uses: actions/setup-node@v4
         with:
           cache: pnpm
-          node-version: ${{ matrix.node-version }}
+          node-version: ${{ env.node-version }}
 
       - name: Install Packages
         run: |