Update upload-artifacts-to-maven-central.yml to accept hotfixes (#2367)

## Goal

Now we can pass 7.6.1, and it'll checkout release/7.6.0 on the checkout step.

Author: bidetofevil

.github/workflows/upload-artifacts-to-maven-central.yml

@@ -32,10 +32,18 @@ jobs:
           git config --global user.name 'embrace-ci[bot]'
           git config --global user.email 'embrace-ci@users.noreply.github.com'
 
+      - name: Extract base version (major.minor.0)
+        id: base_version
+        env:
+          RC_VERSION: ${{ inputs.rc_version }}
+        run: |
+          base_version=$(echo "$RC_VERSION" | cut -d. -f1,2).0
+          echo "base_version=$base_version" >> $GITHUB_OUTPUT
+
       - name: Checkout
         uses: actions/checkout@v4
         with:
-          ref: release/${{ inputs.rc_version }}
+          ref: release/${{ steps.base_version.outputs.base_version }}
           persist-credentials: true
 
       - name: Setup Java