fix spaces in yaml

Author: stanislav-shchetinin

.github/workflows/tests.yaml

@@ -13,14 +13,14 @@ concurrency:
 jobs:
   unit:
     concurrency:
-        group: unit-${{ github.ref }}-${{ matrix.os }}-${{ matrix.go-version }}
-        cancel-in-progress: true
-      strategy:
-        fail-fast: false
-        matrix:
-          os: [ubuntu, macOS]
-      env:
-        OS: ${{ matrix.os }}-latest
+      group: unit-${{ github.ref }}-${{ matrix.os }}-${{ matrix.go-version }}
+      cancel-in-progress: true
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu, macOS]
+    env:
+      OS: ${{ matrix.os }}-latest
     runs-on: ${{ matrix.os }}-latest
     steps:
     - name: Checkout PR