build: Improve formatting of node upgrade instructions

scripts/gen-github-release.sh

@@ -124,29 +124,29 @@ cometbft $COMETBFT_VERSION
 Presuming that your node is running `$PREV_RELEASE`, once the upgrade height for a subsequent proposal to upgrade to `$TAG` has been reached, your node will halt automatically allowing you to upgrade the agoric stack.
 
 ```
-# prepare by installing Go 1.20.2 or higher, Node 16 or 18, clang 10 or gcc 10
-# stop the agd service
+# (prepare by installing Go 1.20.2 or higher, Node 16 or 18, clang 10 or gcc 10)
+# (stop the agd service)
 cd agoric-sdk
 git fetch --all
 git checkout $TAG
 git clean -xdf
 yarn install
 yarn build
 (cd packages/cosmic-swingset && make)
-#start the agd service
+# (start the agd service)
 ```
 
 Do _not_ copy the `agd` script or Go binary to another location. If you would like to have an executable `agd` in another location, then create a symlink in that location pointing to `agoric-sdk/bin/agd`.
 
+### Golang Version
+
+The `$TAG` release requires Go 1.20.2 or higher.
+
 ### Node Version
 
 Node.js 16.13 or higher (previous LTS) or Node.js 18.12 or higher (maintenance LTS).
 Please note the current active LTS of Node 20 is not yet officially supported.
 
-### Golang Version
-
-The `$TAG` release requires Go 1.20.2 or higher.
-
 ### C Compiler Version
 
 Clang version 10 or GCC version 10 required.