Update Release github pipeline to trigger automatically (#1757)

diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index 3804751..794fd33 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -2,6 +2,11 @@
 name: Release
 on:
   workflow_dispatch:
+  push:
+    branches:
+      - main
+    paths:
+      - version.bzl
 
 defaults:
   run:
@@ -14,7 +19,7 @@
   validation:
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       # TODO: Unfortunately it's not obvious how to restrict `workflow_dispatch` to a particular branch
       # so this step ensures releases are always done off of `main`.
       - name: Ensure branch is 'main'
@@ -69,7 +74,7 @@
             env:
               TARGET: "x86_64-unknown-linux-musl"
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Install rust toolchains for host
         run: |
           # Detect the current version of rust
@@ -101,7 +106,7 @@
             bazel ${BAZEL_STARTUP_FLAGS[@]} run //crate_universe/tools/cross_installer -- --target=${TARGET} --output="${OUTPUT_PATH}"
         env:
           TARGET: "${{ matrix.env.TARGET }}"
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v3
         with:
           name: "${{ matrix.env.TARGET }}"
           path: ${{ github.workspace }}/crate_universe/target/artifacts/${{ matrix.env.TARGET }}
@@ -110,8 +115,8 @@
     needs: builds
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/download-artifact@v2
+      - uses: actions/checkout@v3
+      - uses: actions/download-artifact@v3
         with:
           path: ${{ github.workspace }}/crate_universe/target/artifacts
       - name: Detect the current version
@@ -133,7 +138,7 @@
           ARTIFACTS_DIR: ${{ github.workspace }}/crate_universe/target/artifacts
           URL_PREFIX: https://github.com/${{ github.repository_owner }}/rules_rust/releases/download/${{ env.RELEASE_VERSION }}
       # Upload the artifact in case creating a release fails so all artifacts can then be manually recovered.
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v3
         with:
           name: "rules_rust.tar.gz"
           path: ${{ github.workspace }}/.github/rules_rust.tar.gz