[CI] Updates in GitHub Actions

- Updates STACK_VERSION in test matrices
- Fixes Ruby 3.1 to 3.1.5 in Faraday 1 tests due to issue in pre release of 3.1.6
- Updates GitHub Action checkout to v4

.github/workflows/license.yml

@@ -4,7 +4,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ruby/setup-ruby@v1
       with:
         ruby-version: 3

.github/workflows/otel.yml

@@ -17,10 +17,10 @@ jobs:
       fail-fast: false
       matrix:
         ruby: ['3.3', 'jruby-9.4']
-        es_version: ['8.12-SNAPSHOT']
+        es_version: ['8.15.0-SNAPSHOT']
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Increase system limits
         run: |
           sudo swapoff -a

.github/workflows/tests.yml

@@ -16,10 +16,10 @@ jobs:
       fail-fast: false
       matrix:
         ruby: [ '3.0', '3.1', '3.2', '3.3', 'jruby-9.3', 'jruby-9.4' ]
-        es_version: ['8.10-SNAPSHOT', '8.11-SNAPSHOT', '8.12-SNAPSHOT']
+        es_version: ['8.13.5-SNAPSHOT', '8.14.2-SNAPSHOT', '8.15.0-SNAPSHOT']
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Increase system limits
       run: |
         sudo swapoff -a
@@ -53,11 +53,11 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: [ '3.0', '3.1', '3.2', '3.3', 'jruby-9.3' ]
-        es_version: ['8.12-SNAPSHOT']
+        ruby: [ '3.0', '3.1.5', '3.2', '3.3', 'jruby-9.3' ]
+        es_version: ['8.15.0-SNAPSHOT']
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Increase system limits
       run: |
         sudo swapoff -a

Gemfile-faraday1.gemfile

@@ -23,7 +23,7 @@ source 'https://rubygems.org'
 # $ BUNDLE_GEMFILE=./Gemfile-faraday1.gemfile bundle exec rake test:faraday1:unit
 
 gem 'faraday', '~> 1'
-gemspec path: './'
+gemspec
 
 group :development, :test do
   gem 'httpclient'