Rename variable

Previous name was better.

.github/workflows/alpha.yaml

@@ -42,7 +42,7 @@ jobs:
         with:
           build-args: |
             QBT_VERSION=devel
-            LIBBT_BRANCH=RC_2_0
+            LIBBT_VERSION=RC_2_0
             LIBBT_CMAKE_FLAGS=-Ddeprecated-functions=ON
           labels: |
             org.opencontainers.image.authors=https://github.com/qbittorrent/qBittorrent/graphs/contributors

Dockerfile

@@ -20,7 +20,7 @@ RUN \
 FROM base AS builder
 
 ARG QBT_VERSION
-ARG LIBBT_BRANCH="RC_1_2"
+ARG LIBBT_VERSION="RC_1_2"
 ARG LIBBT_CMAKE_FLAGS=""
 
 # check environment variables
@@ -55,7 +55,7 @@ ENV CFLAGS="-pipe -fstack-clash-protection -fstack-protector-strong -fno-plt -U_
 # build libtorrent
 RUN \
   git clone \
-    --branch "${LIBBT_BRANCH}" \
+    --branch "${LIBBT_VERSION}" \
     --depth 1 \
     --recurse-submodules \
     https://github.com/arvidn/libtorrent.git && \

manual_build/Dockerfile

@@ -20,7 +20,7 @@ RUN \
 FROM base AS builder
 
 ARG QBT_VERSION
-ARG LIBBT_BRANCH="RC_1_2"
+ARG LIBBT_VERSION="RC_1_2"
 ARG LIBBT_CMAKE_FLAGS=""
 
 # check environment variables
@@ -55,7 +55,7 @@ ENV CFLAGS="-pipe -fstack-clash-protection -fstack-protector-strong -fno-plt -U_
 # build libtorrent
 RUN \
   git clone \
-    --branch "${LIBBT_BRANCH}" \
+    --branch "${LIBBT_VERSION}" \
     --depth 1 \
     --recurse-submodules \
     https://github.com/arvidn/libtorrent.git && \