update branch name

Signed-off-by: Andrew Whitehead <cywolf@gmail.com>

Author: andrewwhitehead

.github/workflows/rusttest.yml

@@ -3,10 +3,10 @@ name: "Unit Tests"
 on:
   push:
     branches:
-      - master
+      - main
   pull_request:
     branches:
-      - master
+      - main
 
 jobs:
   lints:

README.md

@@ -21,10 +21,10 @@ The initial implementation of `indy-shared-rs` was developed by the Verifiable O
 
 ## Contributing
 
-Pull requests are welcome! Please read our [contributions guide](https://github.com/hyperledger/indy-shared-rs/blob/master/CONTRIBUTING.md) and submit your PRs. We enforce [developer certificate of origin](https://developercertificate.org/) (DCO) commit signing. See guidance [here](https://github.com/apps/dco).
+Pull requests are welcome! Please read our [contributions guide](https://github.com/hyperledger/indy-shared-rs/blob/main/CONTRIBUTING.md) and submit your PRs. We enforce [developer certificate of origin](https://developercertificate.org/) (DCO) commit signing. See guidance [here](https://github.com/apps/dco).
 
 We also welcome issues submitted about problems you encounter in using `indy-shared-rs`.
 
 ## License
 
-[Apache License Version 2.0](https://github.com/hyperledger/indy-shared-rs/blob/master/LICENSE)
+[Apache License Version 2.0](https://github.com/hyperledger/indy-shared-rs/blob/main/LICENSE)

wrappers/python/README.md

@@ -10,10 +10,10 @@ The initial implementation of `indy-shared-rs` was developed by the Verifiable O
 
 ## Contributing
 
-Pull requests are welcome! Please read our [contributions guide](https://github.com/hyperledger/indy-shared-rs/blob/master/CONTRIBUTING.md) and submit your PRs. We enforce [developer certificate of origin](https://developercertificate.org/) (DCO) commit signing. See guidance [here](https://github.com/apps/dco).
+Pull requests are welcome! Please read our [contributions guide](https://github.com/hyperledger/indy-shared-rs/blob/main/CONTRIBUTING.md) and submit your PRs. We enforce [developer certificate of origin](https://developercertificate.org/) (DCO) commit signing. See guidance [here](https://github.com/apps/dco).
 
 We also welcome issues submitted about problems you encounter in using `indy-shared-rs`.
 
 ## License
 
-[Apache License Version 2.0](https://github.com/hyperledger/indy-shared-rs/blob/master/LICENSE)
+[Apache License Version 2.0](https://github.com/hyperledger/indy-shared-rs/blob/main/LICENSE)