Revert "Update protobuf-cpp to 31.1"

This reverts commit 65b3f28.

Author: msakrejda

.github/workflows/ci.yml

@@ -20,19 +20,20 @@ jobs:
       id: cache-protobuf
       uses: actions/cache@v4
       with:
-        path: protobuf-31.1
-        key: ${{ runner.os }}-${{ matrix.compiler }}-${{ matrix.valgrind }}-protobuf-31.1
+        path: protobuf-25.1
+        key: ${{ runner.os }}-${{ matrix.compiler }}-${{ matrix.valgrind }}-protobuf-25.1
     - name: Build protobuf library
       if: matrix.protobuf_lib == 'protobuf-cpp' && steps.cache-protobuf.outputs.cache-hit != 'true'
       run: |
-        git clone --depth 1 --branch v31.1 https://github.com/protocolbuffers/protobuf.git protobuf-31.1
-        cd protobuf-31.1
+        git clone --depth 1 --branch v25.1 https://github.com/protocolbuffers/protobuf.git protobuf-25.1
+        cd protobuf-25.1
+        git submodule update --init --recursive
         cmake .
         cmake --build . --parallel 10
     - name: Install protobuf library
       if: matrix.protobuf_lib == 'protobuf-cpp'
       run: |
-        cd protobuf-31.1
+        cd protobuf-25.1
         sudo make install
         sudo ldconfig
     - name: Install Valgrind

Makefile

@@ -11,7 +11,7 @@ PG_VERSION = 17.4
 PG_VERSION_MAJOR = $(call word-dot,$(PG_VERSION),1)
 PG_VERSION_NUM = 170004
 PG_BRANCH = REL_17_STABLE
-PROTOC_VERSION = 31.1
+PROTOC_VERSION = 25.1
 
 VERSION = 6.1.0
 VERSION_MAJOR = $(call word-dot,$(VERSION),1)