Add back required version for build backend and update regex so it does not match

Author: raulcd

ci/pixi/asan/cpp/pixi.toml

@@ -49,6 +49,7 @@ source.path = "../../../../cpp"
 
 [package.build.backend]
 name = "pixi-build-cmake"
+version = "*"
 
 [package.build.config]
 extra-args = [

ci/pixi/asan/python/pixi.toml

@@ -53,6 +53,7 @@ source.path = "../../../../python"
 
 [package.build.backend]
 name = "pixi-build-python"
+version = "*"
 
 [package.build.config]
 compilers = ["c", "cxx"]

ci/pixi/default/cpp/pixi.toml

@@ -45,6 +45,7 @@ source.path = "../../../../cpp"
 
 [package.build.backend]
 name = "pixi-build-cmake"
+version = "*"
 
 [package.build.config]
 extra-args = [

ci/pixi/default/python/pixi.toml

@@ -49,6 +49,7 @@ source.path = "../../../../python"
 
 [package.build.backend]
 name = "pixi-build-python"
+version = "*"
 
 [package.build.config]
 compilers = ["c", "cxx"]

dev/release/utils-prepare.sh

@@ -72,7 +72,7 @@ update_versions() {
 
   pushd "${ARROW_DIR}/ci/pixi"
     sed -i.bak -E -e \
-    "s/^version = \".+\"/version = \"${python_version}\"/" \
+    "s/^version = \"[0-9].*\"/version = \"${python_version}\"/" \
     */*/pixi.toml
   rm -f */*/pixi.toml.bak
   git add */*/pixi.toml