chore(github): Migrate to renovate GH action (#2520)

chore: Migrate to renovate GH action

Signed-off-by: Marco Maurer <mkilchhofer@users.noreply.github.com>

scripts/renovate-bump-version.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+depName="${1}"
+if [ -z "${depName}" ]; then
+  echo "Missing argument 'depName'" >&2
+  echo "Example usage: $0 argoproj/argo-cd" >&2
+  exit 1
+fi
+
+chartName=$(echo "$depName" | sed -e "s+^argoproj/++" -e "s+^argoproj-labs/++")
+echo "Changed chart name is: $chartName"
+echo "----------------------------------------"
+
+parentDir="charts/${chartName}"
+
+# Bump the chart version by one patch version
+version=$(grep '^version:' "${parentDir}/Chart.yaml" | awk '{print $2}')
+major=$(echo "${version}" | cut -d. -f1)
+minor=$(echo "${version}" | cut -d. -f2)
+patch=$(echo "${version}" | cut -d. -f3)
+patch=$((patch + 1))
+sed -i "s/^version:.*/version: ${major}.${minor}.${patch}/g" "${parentDir}/Chart.yaml"
+
+# Add a changelog entry
+appVersion=$(grep '^appVersion:' "${parentDir}/Chart.yaml" | awk '{print $2}')
+sed -i -e '/^  artifacthub.io\/changes: |/,$ d' "${parentDir}/Chart.yaml"
+{
+  echo "  artifacthub.io/changes: |"
+  echo "    - kind: changed"
+  echo "      description: Bump ${chartName} to ${appVersion}"
+} >> "${parentDir}/Chart.yaml"
+cat "${parentDir}/Chart.yaml"