ref(ci): Remove node version from cache key (#7174)

Best not to hard code this

Author: evanpurkhiser

.github/workflows/test.yml

@@ -19,7 +19,7 @@ jobs:
         id: cache
         with:
           path: ${{ github.workspace }}/node_modules
-          key: node14-${{ runner.os }}-${{ hashfiles('**/yarn.lock') }}
+          key: node-${{ runner.os }}-${{ hashfiles('**/yarn.lock') }}
       - run: yarn install --frozen-lockfile
         if: steps.cache.outputs.cache-hit != 'true'
 
@@ -28,7 +28,7 @@ jobs:
           path: |
             .cache
             public
-          key: node14-${{ runner.os }}-${{ hashfiles('**/yarn.lock') }}-gatsby-build
+          key: node-${{ runner.os }}-${{ hashfiles('**/yarn.lock') }}-gatsby-build
       - name: yarn build
         run: yarn build
 
@@ -54,7 +54,7 @@ jobs:
         id: cache
         with:
           path: ${{ github.workspace }}/node_modules
-          key: node14-${{ runner.os }}-${{ hashFiles('**/yarn.lock') }}
+          key: node-${{ runner.os }}-${{ hashFiles('**/yarn.lock') }}
       - run: yarn install --frozen-lockfile
         if: steps.cache.outputs.cache-hit != 'true'
 
@@ -91,7 +91,7 @@ jobs:
         id: cache
         with:
           path: ${{ github.workspace }}/node_modules
-          key: node14-${{ runner.os }}-${{ hashFiles('**/yarn.lock') }}
+          key: node-${{ runner.os }}-${{ hashFiles('**/yarn.lock') }}
       - run: yarn install --frozen-lockfile
         if: steps.cache.outputs.cache-hit != 'true'
       - name: Run Tests
@@ -107,7 +107,7 @@ jobs:
         id: cache
         with:
           path: ${{ github.workspace }}/node_modules
-          key: node14-${{ runner.os }}-${{ hashFiles('**/yarn.lock') }}
+          key: node-${{ runner.os }}-${{ hashFiles('**/yarn.lock') }}
       - run: yarn install --frozen-lockfile
         if: steps.cache.outputs.cache-hit != 'true'
       - name: Build