chore: removes master branch references

Signed-off-by: Vincent Biret <[email protected]>

Author: baywet

.github/ISSUE_TEMPLATE.md

@@ -12,7 +12,6 @@ Before you open this issue, did you:
 - Search StackOverflow for an answer?
 - Capture the repro steps and gather the information requested in the steps below to reproduce your scenario?
 - Review the samples under github.com/microsoftgraph? They can help for some scenarios.
-- Take a look at the functional tests in this repo? They may have an example for you. See the [functional tests](https://github.com/microsoftgraph/msgraph-sdk-java/tree/master/src/test/java/com/microsoft/graph/functional)
 
 Please provide the following before submitting this issue:
 - Expected behavior. Please provide **links to the specific [Microsoft Graph documentation](https://developer.microsoft.com/en-us/graph/docs/concepts/overview)** you used to determine the expected behavior. 

.github/workflows/conflicting-pr-label.yml

@@ -3,7 +3,7 @@
 name: PullRequestConflicting
 
 # Controls when the action will run. Triggers the workflow on push or pull request
-# events but only for the master branch
+# events but only for the main branch
 on:
   push:
     branches: [main, support/5.x.x]

CONTRIBUTING.md

@@ -60,7 +60,7 @@ Adding a footer with the prefix **BREAKING CHANGE:** will cause an increment of
 
 This project follows the [all contributors](https://github.com/kentcdodds/all-contributors) specification. When making a contribution, please add yourself to the table of contributors:
 
- 1. In section 7. of the [README.md](https://github.com/microsoftgraph/msgraph-sdk-java/blob/master/README.md), after the last "|", copy and paste a new blank contributor element
+ 1. In section 7. of the [README.md](https://github.com/microsoftgraph/msgraph-sdk-java/blob/main/README.md), after the last "|", copy and paste a new blank contributor element
     ```html
     [<img src="https://avatars.githubusercontent.com/u/<your-uid>?v=4" width="100px;"/><br />
     <sub><b>Your Name</b></sub>](your website or github page)<br />

README.md

@@ -98,15 +98,15 @@ For more detailed documentation, see:
 * [Collections](https://docs.microsoft.com/graph/sdks/paging)
 * [Making requests](https://docs.microsoft.com/graph/sdks/create-requests)
 * [Known issues](https://github.com/MicrosoftGraph/msgraph-sdk-java/issues)
-* [Contributions](https://github.com/microsoftgraph/msgraph-sdk-java/blob/master/CONTRIBUTING.md)
+* [Contributions](https://github.com/microsoftgraph/msgraph-sdk-java/blob/main/CONTRIBUTING.md)
 
 ## 5. Issues
 
 For known issues, see [issues](https://github.com/MicrosoftGraph/msgraph-sdk-java/issues).
 
 ## 6. Contributions
 
-The Microsoft Graph SDK is open for contribution. To contribute to this project, see [Contributing](https://github.com/microsoftgraph/msgraph-sdk-java/blob/master/CONTRIBUTING.md).
+The Microsoft Graph SDK is open for contribution. To contribute to this project, see [Contributing](https://github.com/microsoftgraph/msgraph-sdk-java/blob/main/CONTRIBUTING.md).
 
 ## 7. Supported Java versions
 

docs/proguard-rules.txt

@@ -2,7 +2,7 @@
 -keepnames public class * implements com.microsoft.graph.serializer.IJsonBackedObject
 
 ## GSON 2.2.4 specific rules ##
-# Source: https://github.com/google/gson/blob/master/examples/android-proguard-example/proguard.cfg
+# Source: https://github.com/google/gson/blob/main/examples/android-proguard-example/proguard.cfg
 # Gson uses generic type information stored in a class file when working with fields. Proguard
 # removes such information by default, so configure it to keep all of it.
 -keepattributes Signature