CI: Clean up formatting in GitHub Action definitions

This patch cleans up the formatting within the .yml definition files for GitHub
Actions to ensure a consistent look across all actions.
diff --git a/.github/workflows/musl.yml b/.github/workflows/musl.yml
index 19d82af..c106b1d 100644
--- a/.github/workflows/musl.yml
+++ b/.github/workflows/musl.yml
@@ -1,6 +1,7 @@
 name: alpine/musl
 
-on: [push]
+on:
+  push:
 
 permissions:
   contents: read
@@ -12,30 +13,30 @@
       container:
         image: alpine:latest
       steps:
-        - uses: actions/checkout@master
-        - name: Install dependencies
-          run: apk add gcc make tar git python3 libc-dev linux-headers pcre-dev pcre2-dev openssl-dev lua5.3-dev grep socat curl
-        - name: Install VTest
-          run: scripts/build-vtest.sh
-        - name: Build
-          run: make -j$(nproc) CC=cc V=1 TARGET=linux-musl USE_LUA=1 LUA_INC=/usr/include/lua5.3 LUA_LIB=/usr/lib/lua5.3 USE_OPENSSL=1 USE_PCRE2=1 USE_PCRE2_JIT=1 USE_PROMEX=1
-        - name: Show version
-          run: ./haproxy -vv
-        - name: Show linked libraries
-          run: ldd haproxy
-        - name: Install problem matcher for VTest
-          # This allows one to more easily see which tests fail.
-          run: echo "::add-matcher::.github/vtest.json"
-        - name: Run VTest
-          id: vtest
-          run: make reg-tests VTEST_PROGRAM=../vtest/vtest REGTESTS_TYPES=default,bug,devel
-        - name: Show results
-          if: ${{ failure() }}
-          run: |
-            for folder in /tmp/haregtests-*/vtc.*; do
-              printf "::group::"
-              cat $folder/INFO
-              cat $folder/LOG
-              echo "::endgroup::"
-            done
-            shopt -s nullglob
+      - uses: actions/checkout@master
+      - name: Install dependencies
+        run: apk add gcc make tar git python3 libc-dev linux-headers pcre-dev pcre2-dev openssl-dev lua5.3-dev grep socat curl
+      - name: Install VTest
+        run: scripts/build-vtest.sh
+      - name: Build
+        run: make -j$(nproc) CC=cc V=1 TARGET=linux-musl USE_LUA=1 LUA_INC=/usr/include/lua5.3 LUA_LIB=/usr/lib/lua5.3 USE_OPENSSL=1 USE_PCRE2=1 USE_PCRE2_JIT=1 USE_PROMEX=1
+      - name: Show version
+        run: ./haproxy -vv
+      - name: Show linked libraries
+        run: ldd haproxy
+      - name: Install problem matcher for VTest
+        # This allows one to more easily see which tests fail.
+        run: echo "::add-matcher::.github/vtest.json"
+      - name: Run VTest
+        id: vtest
+        run: make reg-tests VTEST_PROGRAM=../vtest/vtest REGTESTS_TYPES=default,bug,devel
+      - name: Show results
+        if: ${{ failure() }}
+        run: |
+          for folder in /tmp/haregtests-*/vtc.*; do
+            printf "::group::"
+            cat $folder/INFO
+            cat $folder/LOG
+            echo "::endgroup::"
+          done
+          shopt -s nullglob