Add polyjuice-v1.2.0 into prebuilds

https://github.com/nervosnetwork/godwoken-docker-prebuilds/pkgs/container/godwoken-prebuilds/24701212?tag=1.2.0-rc1
> "ref.component.godwoken-polyjuice": "1.2.0  b1e0622"

https://github.com/nervosnetwork/godwoken-polyjuice/releases/tag/1.2.0

Dockerfile.fast

@@ -1,9 +1,13 @@
-# Some hardfork versions
+# Some historical versions
 
-# Godwoken testnet_v1 blocks[0..110000] uses polyjuice_v1.1.5-beta
-# - https://github.com/nervosnetwork/godwoken-docker-prebuilds/pkgs/container/godwoken-prebuilds/23550942?tag=v1.1.4-rc1-202205301007
-# - https://github.com/nervosnetwork/godwoken-polyjuice/releases/tag/v1.1.5-beta
-FROM ghcr.io/nervosnetwork/godwoken-prebuilds:v1.1.4-rc1-202205301007 as polyjuice_v1.1.5-beta
+# Godwoken testnet_v1 blocks[0..110000] uses polyjuice-v1.1.5-beta
+# https://github.com/nervosnetwork/godwoken-docker-prebuilds/pkgs/container/godwoken-prebuilds/23550942?tag=v1.1.4-rc1
+# > "ref.component.godwoken-polyjuice": "v1.1.5-beta  2607851"
+FROM ghcr.io/nervosnetwork/godwoken-prebuilds:v1.1.4-rc1 as polyjuice-v1.1.5-beta
+
+# https://github.com/nervosnetwork/godwoken-docker-prebuilds/pkgs/container/godwoken-prebuilds/24701212?tag=1.2.0-rc1
+# > "ref.component.godwoken-polyjuice": "1.2.0  b1e0622"
+FROM ghcr.io/nervosnetwork/godwoken-prebuilds:1.2.0-rc1 as polyjuice-v1.2.0
 
 ################################################################################
 FROM ubuntu:21.04
@@ -49,10 +53,19 @@ COPY build/godwoken-polyjuice/build/*generator* /scripts/godwoken-polyjuice/
 COPY build/godwoken-polyjuice/build/*validator* /scripts/godwoken-polyjuice/
 ################################################################################
 
-############################ polyjuice_v1.1.5-beta #############################
+############################## polyjuice-v1.2.0 ################################
+# https://github.com/nervosnetwork/godwoken-polyjuice/releases/tag/1.2.0
+RUN mkdir -p /scripts/godwoken-polyjuice-v1.2.0
+
+COPY --from=polyjuice-v1.2.0 /scripts/godwoken-polyjuice/* \
+                             /scripts/godwoken-polyjuice-v1.2.0/
+################################################################################
+
+############################ polyjuice-v1.1.5-beta #############################
+# https://github.com/nervosnetwork/godwoken-polyjuice/releases/tag/v1.1.5-beta
 RUN mkdir -p /scripts/godwoken-polyjuice-v1.1.5-beta
 
-COPY --from=polyjuice_v1.1.5-beta /scripts/godwoken-polyjuice/* \
+COPY --from=polyjuice-v1.1.5-beta /scripts/godwoken-polyjuice/* \
                                   /scripts/godwoken-polyjuice-v1.1.5-beta/
 ################################################################################