Update references to default branch name as it has changed to main

Signed-off-by: Martin Hickey <martin.hickey@ie.ibm.com>

.github/pull_request_template.md

@@ -1,5 +1,5 @@
 <!--  Thanks for sending a pull request!  Here are some tips for you:
-1. Make sure to read the Contributing Guide before submitting your PR: https://github.com/helm/helm/blob/master/CONTRIBUTING.md
+1. Make sure to read the Contributing Guide before submitting your PR: https://github.com/helm/helm/blob/main/CONTRIBUTING.md
 2. If this PR closes another issue, add 'closes #<issue number>' somewhere in the PR summary. GitHub will automatically close that issue when this PR gets merged. Alternatively, adding 'refs #<issue number>' will not close the issue, but help provide the reviewer more context.-->
 
 **What this PR does / why we need it**:

.github/workflows/codeql-analysis.yml

@@ -13,10 +13,10 @@ name: "CodeQL"
 
 on:
   push:
-    branches: [ master ]
+    branches: [ main ]
   pull_request:
     # The branches below must be a subset of the branches above
-    branches: [ master ]
+    branches: [ main ]
   schedule:
     - cron: '29 6 * * 6'
 

scripts/get-helm-3

@@ -185,13 +185,13 @@ verifyChecksum() {
   echo "Done."
 }
 
-# verifySignatures obtains the latest KEYS file from GitHub master branch
+# verifySignatures obtains the latest KEYS file from GitHub main branch
 # as well as the signature .asc files from the specific GitHub release,
 # then verifies that the release artifacts were signed by a maintainer's key.
 verifySignatures() {
   printf "Verifying signatures... "
   local keys_filename="KEYS"
-  local github_keys_url="https://raw.githubusercontent.com/helm/helm/master/${keys_filename}"
+  local github_keys_url="https://raw.githubusercontent.com/helm/helm/main/${keys_filename}"
   if [ "${HAS_CURL}" == "true" ]; then
     curl -SsL "${github_keys_url}" -o "${HELM_TMP_ROOT}/${keys_filename}"
   elif [ "${HAS_WGET}" == "true" ]; then

scripts/release-notes.sh

@@ -91,7 +91,7 @@ Download Helm ${RELEASE}. The common platform binaries are here:
 - [Linux s390x](https://get.helm.sh/helm-${RELEASE}-linux-s390x.tar.gz) ([checksum](https://get.helm.sh/helm-${RELEASE}-linux-s390x.tar.gz.sha256sum) / $(cat _dist/helm-${RELEASE}-linux-s390x.tar.gz.sha256))
 - [Windows amd64](https://get.helm.sh/helm-${RELEASE}-windows-amd64.zip) ([checksum](https://get.helm.sh/helm-${RELEASE}-windows-amd64.zip.sha256sum) / $(cat _dist/helm-${RELEASE}-windows-amd64.zip.sha256))
 
-The [Quickstart Guide](https://helm.sh/docs/intro/quickstart/) will get you going from there. For **upgrade instructions** or detailed installation notes, check the [install guide](https://helm.sh/docs/intro/install/). You can also use a [script to install](https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3) on any system with \`bash\`.
+The [Quickstart Guide](https://helm.sh/docs/intro/quickstart/) will get you going from there. For **upgrade instructions** or detailed installation notes, check the [install guide](https://helm.sh/docs/intro/install/). You can also use a [script to install](https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3) on any system with \`bash\`.
 
 ## What's Next