fix: remove literal quotes from ruby all_samples and restore nestjs node-version matrix

samples-ruby.yaml: all three all_samples entries were wrapped in single
quotes ('samples/...'). YAML block scalars treat these as literal characters
so compute-matrix prefix matching never matched — ruby builds silently
skipped on every PR regardless of what changed.

samples-typescript-nestjs-server.yaml: the original workflow had a 2D matrix
(node-version x sample). The refactor accidentally placed node versions 20
and 22 into all_samples: and dropped the node-version static dimension,
making matrix.node-version undefined at runtime. Restores node-version:
[20, 22] as a static dimension alongside the samples output (same pattern
as samples-swift5.yaml uses for os: + sample:).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: Picazsoo

.github/workflows/samples-ruby.yaml

@@ -30,9 +30,9 @@ jobs:
           # Action inputs don't support arrays, so this is a newline-delimited string parsed in the action script.
           # To add a new sample: add it here AND add a matching entry to the paths: trigger above.
           all_samples: |
-            'samples/client/echo_api/ruby-httpx/'
-            'samples/client/echo_api/ruby-faraday/'
-            'samples/client/echo_api/ruby-typhoeus/'
+            samples/client/echo_api/ruby-httpx
+            samples/client/echo_api/ruby-faraday
+            samples/client/echo_api/ruby-typhoeus
 
   build:
     name: Build Ruby

.github/workflows/samples-typescript-nestjs-server.yaml

@@ -11,7 +11,7 @@ jobs:
   setup:
     runs-on: ubuntu-latest
     outputs:
-      matrix: ${{ steps.filter.outputs.matrix }}
+      samples: ${{ steps.filter.outputs.samples }}
     steps:
       - uses: actions/checkout@v5
         with:
@@ -24,17 +24,17 @@ jobs:
           # To add a new sample: add it here AND add a matching entry to the paths: trigger above.
           all_samples: |
             samples/server/petstore/typescript-nestjs-server
-            20
-            22
 
   build:
     name: Test TypeScript NestJS Server
     needs: setup
-    if: ${{ needs.setup.outputs.matrix != '[]' }}
+    if: ${{ needs.setup.outputs.samples != '[]' }}
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
-      matrix: ${{ fromJson(needs.setup.outputs.matrix) }}
+      matrix:
+        node-version: [20, 22]
+        sample: ${{ fromJson(needs.setup.outputs.samples) }}
     steps:
       - uses: actions/checkout@v5