chore: simplify Node.js version matrix in GitHub Actions workflows

- Updated Node.js version matrix in the GitHub Actions workflows for baseline, test, and compare jobs to only include versions 18 and 26, removing versions 20, 22, and 24 for streamlined testing.

Author: GroophyLifefor

.github/workflows/pr.yml

@@ -15,7 +15,7 @@ jobs:
     name: Run Baseline Load Tests (node ${{ matrix.node }})
     strategy:
       matrix:
-        node: [18, 20, 22, 24, 26]
+        node: [18, 26]
     uses: ./.github/workflows/load.yml
     with:
       gitRef: ${{ github.event.pull_request.base.sha }}
@@ -26,7 +26,7 @@ jobs:
     name: Run Test Load Tests (node ${{ matrix.node }})
     strategy:
       matrix:
-        node: [18, 20, 22, 24, 26]
+        node: [18, 26]
     uses: ./.github/workflows/load.yml
     with:
       gitRef: ${{ github.event.pull_request.head.sha }}
@@ -38,7 +38,7 @@ jobs:
     needs: [baseline, test]
     strategy:
       matrix:
-        node: [18, 20, 22, 24, 26]
+        node: [18, 26]
     uses: ./.github/workflows/compare.yml
     with:
       gitRef: ${{ github.event.pull_request.head.sha }}