fix: update source files path in scripts to reflect project structure

scripts/check

@@ -4,7 +4,7 @@ export PREFIX=""
 if [ -d 'venv' ] ; then
     export PREFIX="venv/bin/"
 fi
-export SOURCE_FILES="httpx tests"
+export SOURCE_FILES="python tests"
 
 set -x
 

scripts/lint

@@ -4,7 +4,7 @@ export PREFIX=""
 if [ -d 'venv' ]; then
     export PREFIX="venv/bin/"
 fi
-export SOURCE_FILES="httpx tests"
+export SOURCE_FILES="python tests"
 
 set -x
 

scripts/sync-version

@@ -2,7 +2,7 @@
 
 SEMVER_REGEX="([0-9]+)\.([0-9]+)\.([0-9]+)(?:-([0-9A-Za-z-]+(?:\.[0-9A-Za-z-]+)*))?(?:\+[0-9A-Za-z-]+)?"
 CHANGELOG_VERSION=$(grep -o -E $SEMVER_REGEX CHANGELOG.md | sed -n 2p)
-VERSION=$(grep -o -E $SEMVER_REGEX httpx/__version__.py | head -1)
+VERSION=$(grep -o -E $SEMVER_REGEX python/httpx/__version__.py | head -1)
 echo "CHANGELOG_VERSION: $CHANGELOG_VERSION"
 echo "VERSION: $VERSION"
 if [ "$CHANGELOG_VERSION" != "$VERSION" ]; then