Upgrade all github actions to v4 variants

Author: tnull

.github/workflows/build.yml

@@ -22,7 +22,7 @@ jobs:
     runs-on: ${{ matrix.platform }}
     steps:
       - name: Checkout source code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install Rust ${{ matrix.toolchain }} toolchain
         run: |
           curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --profile=minimal --default-toolchain ${{ matrix.toolchain }}
@@ -72,7 +72,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout source code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Install Rust stable toolchain
@@ -94,14 +94,14 @@ jobs:
       TOOLCHAIN: stable
     steps:
       - name: Checkout source code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install Rust ${{ env.TOOLCHAIN }} toolchain
         run: |
           curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --profile=minimal --default-toolchain ${{ env.TOOLCHAIN }}
           rustup override set ${{ env.TOOLCHAIN }}
       - name: Cache routing graph snapshot
         id: cache-graph
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: lightning/net_graph-2023-12-10.bin
           key: ldk-net_graph-v0.0.118-2023-12-10.bin
@@ -118,7 +118,7 @@ jobs:
           EXPECTED_ROUTING_GRAPH_SNAPSHOT_SHASUM: e94b38ef4b3ce683893bf6a3ee28d60cb37c73b059403ff77b7e7458157968c2
       - name: Cache scorer snapshot
         id: cache-scorer
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: lightning/scorer-2023-12-10.bin
           key: ldk-scorer-v0.0.118-2023-12-10.bin
@@ -164,7 +164,7 @@ jobs:
       TOOLCHAIN: stable
     steps:
       - name: Checkout source code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Install Rust ${{ env.TOOLCHAIN }} toolchain
@@ -187,7 +187,7 @@ jobs:
       TOOLCHAIN: stable
     steps:
       - name: Checkout source code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Install Rust ${{ env.TOOLCHAIN }} toolchain
@@ -216,7 +216,7 @@ jobs:
       TOOLCHAIN: 1.63
     steps:
       - name: Checkout source code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install Rust ${{ env.TOOLCHAIN }} toolchain
         run: |
           curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --profile=minimal --default-toolchain ${{ env.TOOLCHAIN }}
@@ -239,7 +239,7 @@ jobs:
       TOOLCHAIN: stable
     steps:
       - name: Checkout source code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install Rust ${{ env.TOOLCHAIN }} toolchain
         run: |
           curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --profile=minimal --default-toolchain ${{ env.TOOLCHAIN }}
@@ -257,7 +257,7 @@ jobs:
       TOOLCHAIN: 1.63.0
     steps:
       - name: Checkout source code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install Rust ${{ env.TOOLCHAIN }} toolchain
         run: |
           curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --profile=minimal --default-toolchain ${{ env.TOOLCHAIN }}
@@ -272,7 +272,7 @@ jobs:
     runs-on: ubuntu-latest
     if: github.ref_name != 'main' # `main` has no diff with itself
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Relative diff