updated README and rosinstall with HTTPS-based links to repos

Author: rayvburn

README.md

@@ -29,7 +29,7 @@ Follow the steps below to clone SRPB-related packages:
 
 ```sh
 cd <WS_DIR>/src
-git clone --recurse-submodules git@github.com:rayvburn/srpb.git -b melodic-devel srpb/srpb
+git clone --recurse-submodules https://github.com/rayvburn/srpb.git -b melodic-devel srpb/srpb
 rosinstall -n . srpb/srpb/srpb.rosinstall
 ```
 

srpb.rosinstall

@@ -1,12 +1,12 @@
 - git:
     local-name: srpb/srpb_move_base
-    uri: git@github.com:rayvburn/srpb_move_base.git  # private repo
+    uri: https://github.com/rayvburn/srpb_move_base.git
     version: melodic-devel-srpb
 - git:
     local-name: srpb/people_msgs_utils
-    uri: git@github.com:rayvburn/people_msgs_utils.git  # private repo
+    uri: https://github.com/rayvburn/people_msgs_utils.git
     version: master
 - git:
     local-name: srpb/social_nav_utils
-    uri: git@github.com:rayvburn/social_nav_utils.git  # private repo
+    uri: https://github.com/rayvburn/social_nav_utils.git
     version: master