ci(v3): update cmake deps

Author: scotthart

ci/cloudbuild/dockerfiles/demo-debian-bullseye.Dockerfile

@@ -62,7 +62,7 @@ RUN apt-get update && \
 
 # ```bash
 WORKDIR /var/tmp/build/protobuf
-RUN curl -fsSL https://github.com/protocolbuffers/protobuf/archive/v31.1.tar.gz | \
+RUN curl -fsSL https://github.com/protocolbuffers/protobuf/archive/v33.1.tar.gz | \
     tar -xzf - --strip-components=1 && \
     cmake \
         -DCMAKE_BUILD_TYPE=Release \

ci/cloudbuild/dockerfiles/demo-rockylinux-9.Dockerfile

@@ -91,7 +91,7 @@ RUN curl -fsSL https://github.com/abseil/abseil-cpp/archive/20250814.1.tar.gz |
 
 # ```bash
 WORKDIR /var/tmp/build/protobuf
-RUN curl -fsSL https://github.com/protocolbuffers/protobuf/archive/v31.1.tar.gz | \
+RUN curl -fsSL https://github.com/protocolbuffers/protobuf/archive/v33.1.tar.gz | \
     tar -xzf - --strip-components=1 && \
     cmake \
         -DCMAKE_BUILD_TYPE=Release \

ci/cloudbuild/dockerfiles/demo-ubuntu-focal.Dockerfile

@@ -52,7 +52,7 @@ RUN curl -fsSL https://github.com/abseil/abseil-cpp/archive/20250814.1.tar.gz |
 
 # ```bash
 WORKDIR /var/tmp/build/protobuf
-RUN curl -fsSL https://github.com/protocolbuffers/protobuf/archive/v31.1.tar.gz | \
+RUN curl -fsSL https://github.com/protocolbuffers/protobuf/archive/v33.1.tar.gz | \
     tar -xzf - --strip-components=1 && \
     cmake \
         -DCMAKE_BUILD_TYPE=Release \

ci/cloudbuild/dockerfiles/demo-ubuntu-jammy.Dockerfile

@@ -52,7 +52,7 @@ RUN curl -fsSL https://github.com/abseil/abseil-cpp/archive/20250814.1.tar.gz |
 
 # ```bash
 WORKDIR /var/tmp/build/protobuf
-RUN curl -fsSL https://github.com/protocolbuffers/protobuf/archive/v31.1.tar.gz | \
+RUN curl -fsSL https://github.com/protocolbuffers/protobuf/archive/v33.1.tar.gz | \
     tar -xzf - --strip-components=1 && \
     cmake \
         -DCMAKE_BUILD_TYPE=Release \

ci/cloudbuild/dockerfiles/fedora-latest-cmake.Dockerfile

@@ -117,7 +117,7 @@ RUN curl -fsSL https://github.com/nlohmann/json/archive/v3.11.3.tar.gz | \
     ldconfig && cd /var/tmp && rm -fr build
 
 WORKDIR /var/tmp/build/protobuf
-RUN curl -fsSL https://github.com/protocolbuffers/protobuf/archive/v31.1.tar.gz | \
+RUN curl -fsSL https://github.com/protocolbuffers/protobuf/archive/v33.1.tar.gz | \
     tar -xzf - --strip-components=1 && \
     cmake \
         -DCMAKE_BUILD_TYPE=Release \

ci/cloudbuild/dockerfiles/fedora-latest-cxx20.Dockerfile

@@ -125,7 +125,7 @@ RUN curl -fsSL https://github.com/nlohmann/json/archive/v3.11.3.tar.gz | \
     cd /var/tmp && rm -fr build
 
 WORKDIR /var/tmp/build/protobuf
-RUN curl -fsSL https://github.com/protocolbuffers/protobuf/archive/v31.1.tar.gz | \
+RUN curl -fsSL https://github.com/protocolbuffers/protobuf/archive/v33.1.tar.gz | \
     tar -xzf - --strip-components=1 && \
     cmake \
         -DCMAKE_CXX_STANDARD=20 \

ci/cloudbuild/dockerfiles/gcc-oldest.Dockerfile

@@ -78,7 +78,7 @@ RUN curl -fsSL https://github.com/google/benchmark/archive/v1.9.2.tar.gz | \
     ldconfig && cd /var/tmp && rm -fr build
 
 WORKDIR /var/tmp/build/protobuf
-RUN curl -fsSL https://github.com/protocolbuffers/protobuf/archive/v31.1.tar.gz | \
+RUN curl -fsSL https://github.com/protocolbuffers/protobuf/archive/v33.1.tar.gz | \
     tar -xzf - --strip-components=1 && \
     cmake \
         -DCMAKE_BUILD_TYPE=Release \

ci/cloudbuild/dockerfiles/ubuntu-20.04-install.Dockerfile

@@ -110,7 +110,7 @@ RUN curl -fsSL https://github.com/nlohmann/json/archive/v3.11.3.tar.gz | \
 
 
 WORKDIR /var/tmp/build/protobuf
-RUN curl -fsSL https://github.com/protocolbuffers/protobuf/archive/v31.1.tar.gz | \
+RUN curl -fsSL https://github.com/protocolbuffers/protobuf/archive/v33.1.tar.gz | \
     tar -xzf - --strip-components=1 && \
     cmake \
         -DCMAKE_BUILD_TYPE=Release \