ci: move github label script under the github directory

diff --git a/.github/gen_label_config.sh b/.github/gen_label_config.sh
new file mode 100755
index 00000000..1527891f
--- /dev/null
+++ b/.github/gen_label_config.sh
@@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+# Generates the label configuration using crates in the repository.
+# The label configuration is appended to the labeler config file.
+
+config=.github/labeler.yml
+
+# Define a default value for SCAN_DIR if not set
+: "${SCAN_DIR:=.}"
+
+if [ "${1:-default}" != "--force" ] && ! git diff --exit-code "$config";
+then
+	echo "Error: $config is not committed."
+	echo "Refusing to overwrite it to prevent disaster."
+	echo "Run the script with --force to override this."
+	exit 1
+fi
+
+excluded_crates="fuzz"
+
+CRATES="$(cd "$SCAN_DIR" && cargo metadata --no-deps --format-version 1 | jq -j -r '.packages | map(.manifest_path | rtrimstr("/Cargo.toml") | ltrimstr("'"$PWD"'/")) | join(" ")')"
+
+for crate in $CRATES;
+do
+	if echo "$crate" | grep -qE "$excluded_crates";
+	then
+		continue
+	fi
+
+	{
+		echo "C-$crate:"
+		echo "  - changed-files:"
+		echo "    - any-glob-to-any-file: $crate/**"
+	} >> "$config"
+done
diff --git a/.github/workflows/manage-pr.yml b/.github/workflows/manage-pr.yml
index 42c5236c..a61a9f83 100644
--- a/.github/workflows/manage-pr.yml
+++ b/.github/workflows/manage-pr.yml
@@ -22,7 +22,7 @@ jobs:
           ref: "refs/pull/${{ github.event.number }}/merge"
           persist-credentials: false
       - name: Generate label config
-        run: cd master && SCAN_DIR=../merge ./contrib/gen_label_config.sh
+        run: cd master && SCAN_DIR=../merge ./.github/gen_label_config.sh
       - name: Update labels
         uses: actions/labeler@f27b608878404679385c85cfa523b85ccb86e213 # v6.1.0
         with:
diff --git a/contrib/gen_label_config.sh b/contrib/gen_label_config.sh
deleted file mode 100755
index 1527891f..00000000
--- a/contrib/gen_label_config.sh
+++ /dev/null
@@ -1,37 +0,0 @@
-#!/usr/bin/env bash
-
-set -euo pipefail
-
-# Generates the label configuration using crates in the repository.
-# The label configuration is appended to the labeler config file.
-
-config=.github/labeler.yml
-
-# Define a default value for SCAN_DIR if not set
-: "${SCAN_DIR:=.}"
-
-if [ "${1:-default}" != "--force" ] && ! git diff --exit-code "$config";
-then
-	echo "Error: $config is not committed."
-	echo "Refusing to overwrite it to prevent disaster."
-	echo "Run the script with --force to override this."
-	exit 1
-fi
-
-excluded_crates="fuzz"
-
-CRATES="$(cd "$SCAN_DIR" && cargo metadata --no-deps --format-version 1 | jq -j -r '.packages | map(.manifest_path | rtrimstr("/Cargo.toml") | ltrimstr("'"$PWD"'/")) | join(" ")')"
-
-for crate in $CRATES;
-do
-	if echo "$crate" | grep -qE "$excluded_crates";
-	then
-		continue
-	fi
-
-	{
-		echo "C-$crate:"
-		echo "  - changed-files:"
-		echo "    - any-glob-to-any-file: $crate/**"
-	} >> "$config"
-done