ci: Update prepare-runner action to fix macOS build environment

Updates XRPLF/actions prepare-runner to version 2cbf48101 which fixes
pip upgrade failures on macOS runners with Homebrew-managed Python.

Author: vlntb

.github/workflows/reusable-build-test-config.yml

@@ -77,9 +77,9 @@ jobs:
         uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
 
       - name: Prepare runner
-        uses: XRPLF/actions/.github/actions/prepare-runner@99685816bb60a95a66852f212f382580e180df3a
+        uses: XRPLF/actions/prepare-runner@2cbf481018d930656e9276fcc20dc0e3a0be5b6d
         with:
-          disable_ccache: false
+          enable_ccache: ${{ inputs.ccache_enabled }}
 
       - name: Print build environment
         uses: ./.github/actions/print-env

.github/workflows/upload-conan-deps.yml

@@ -70,9 +70,9 @@ jobs:
         uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
 
       - name: Prepare runner
-        uses: XRPLF/actions/.github/actions/prepare-runner@99685816bb60a95a66852f212f382580e180df3a
+        uses: XRPLF/actions/prepare-runner@2cbf481018d930656e9276fcc20dc0e3a0be5b6d
         with:
-          disable_ccache: false
+          enable_ccache: false
 
       - name: Print build environment
         uses: ./.github/actions/print-env