Release notes and Readme update (#211)

Co-authored-by: Tyler Ruppert <{ID}+{username}@users.noreply.github.com>

README.md

@@ -58,7 +58,7 @@ This repo does not accept issues. Please use https://github.com/palomachain/palo
 ### To get the latest prebuilt `pigeon` binary:
 
 ```shell
-wget -O - https://github.com/palomachain/pigeon/releases/download/v1.2.1/pigeon_Linux_x86_64.tar.gz  | \
+wget -O - https://github.com/palomachain/pigeon/releases/download/v1.4.0/pigeon_Linux_x86_64.tar.gz  | \
   sudo tar -C /usr/local/bin -xvzf - pigeon
 sudo chmod +x /usr/local/bin/pigeon
 
@@ -69,7 +69,7 @@ mkdir ~/.pigeon
 ```shell
 git clone https://github.com/palomachain/pigeon.git
 cd pigeon
-git checkout v1.2.1
+git checkout v1.4.0
 make build
 sudo mv ./build/pigeon /usr/local/bin/pigeon
 

RELEASE_NOTES.md

@@ -0,0 +1,10 @@
+## What's Changed
+* Updates to the github PR template by @ToasterTheBrave in https://github.com/palomachain/pigeon/pull/207
+* Ignoring a local directory used for notes by @ToasterTheBrave in https://github.com/palomachain/pigeon/pull/208
+* feat: link to op-geth by @byte-bandit in https://github.com/palomachain/pigeon/pull/209
+* Keep paloma version up to date by @ToasterTheBrave in https://github.com/palomachain/pigeon/pull/210
+
+## New Contributors
+* @byte-bandit made their first contribution in https://github.com/palomachain/pigeon/pull/209
+
+**Full Changelog**: https://github.com/palomachain/pigeon/compare/v1.3.0...v1.4.0