workflows: switch to macos-latest from old macos-14

Initially it was the only ARM option available, now it's outdated and latest
(macos-15 now) is ARM-based anyway. Follow https://github.com/nspcc-dev/.github/blob/6c4dff04862ad947805e82fb9b664899906c6305/gh.md

Signed-off-by: Roman Khimov <roman@nspcc.ru>

Author: roman-khimov

.github/workflows/build.yml

@@ -37,7 +37,7 @@ jobs:
     runs-on: ${{matrix.os.name}}
     strategy:
       matrix:
-        os: [{ name: ubuntu-latest, bin-name: linux }, { name: macos-14, bin-name: darwin }] # { name: windows-latest, bin-name: windows }
+        os: [{ name: ubuntu-latest, bin-name: linux }, { name: macos-latest, bin-name: darwin }] # { name: windows-latest, bin-name: windows }
         arch: [amd64, arm64]
 
     steps:

.github/workflows/go.yml

@@ -45,11 +45,11 @@ jobs:
     name: Unit tests
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-14]
+        os: [ubuntu-latest, macos-latest]
         go: [ '1.24', '1.25' ]
         exclude:
           # Only the latest Go version MacOS.
-          - os: macos-14
+          - os: macos-latest
             go: '1.24'
           # Exclude the latest Go version for Ubuntu as Coverage uses it.
           - os: ubuntu-latest

.github/workflows/run-tests.yml

@@ -54,7 +54,7 @@ jobs:
       tests_parallel_level: 3
       os: >
         [{"runner": "ubuntu-latest", "binary": "linux-amd64"},
-         {"runner": "macos-14", "binary": "darwin-arm64"}]
+         {"runner": "macos-latest", "binary": "darwin-arm64"}]
     secrets: inherit
 
   run_all_tests:
@@ -73,6 +73,6 @@ jobs:
       tests_parallel_level: 3
       os: >
         [{"runner": "ubuntu-latest", "binary": "linux-amd64"},
-         {"runner": "macos-14", "binary": "darwin-arm64", "shard": 0},
-         {"runner": "macos-14", "binary": "darwin-arm64", "shard": 1}]
+         {"runner": "macos-latest", "binary": "darwin-arm64", "shard": 0},
+         {"runner": "macos-latest", "binary": "darwin-arm64", "shard": 1}]
     secrets: inherit