Bump GH actions versions.

Author: mp911de

.github/workflows/ci.yml

@@ -12,9 +12,9 @@ jobs:
     if: github.repository == 'pgjdbc/r2dbc-postgresql'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up JDK 1.8
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           java-version: 8
           distribution: temurin

.github/workflows/pullrequests.yml

@@ -9,9 +9,9 @@ jobs:
   pr-build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up JDK 1.8
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           java-version: 8
           distribution: temurin

.github/workflows/release.yml

@@ -12,9 +12,9 @@ jobs:
     if: github.repository == 'pgjdbc/r2dbc-postgresql'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up JDK 1.8
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           java-version: 8
           distribution: temurin