Merge pull request #17999 from github/ecosystem-footnotes

Add superscripts to reference footnotes in supported-package-managers.md

Author: mchammer01

data/reusables/dependabot/supported-package-managers.md

@@ -15,21 +15,21 @@ Elm | `elm` | v0.18, v0.19 | **✓** | |
 git submodule | `gitsubmodule` | N/A (no version) | **✓** | |
 GitHub Actions | `github-actions` |  N/A (no version) | **✓** | |
 Go modules | `gomod` | v1 | **✓** | **✓** |
-Gradle | `gradle` | see (A) below | **✓** | |
-Maven | `maven` | see (B) below | **✓** | |
+Gradle | `gradle` | N/A (no version)<sup>[1]</sup> | **✓** | |
+Maven | `maven` | N/A (no version)<sup>[2]</sup> | **✓** | |
 npm | `npm` | v6, v7 | **✓** | |
-NuGet | `nuget` | <= 4.8.</br>see (C) below | **✓** | |
+NuGet | `nuget` | <= 4.8<sup>[3]</sup> | **✓** | |
 pip | `pip` | v20 | | |
 pipenv | `pip` | <= 2018.11.26 | | |
 pip-compile | `pip` | 5.5.0 | | |
 poetry | `pip` | v1 | | |
 Terraform | `terraform` | <= 0.11 | **✓** | |
 yarn | `npm` | v1 | **✓** | |
 
-(A) {% data variables.product.prodname_dependabot %} doesn't run Gradle but supports updates to the following files: `build.gradle` and `build.gradle.kts` (for Kotlin projects).
+[1] {% data variables.product.prodname_dependabot %} doesn't run Gradle but supports updates to the following files: `build.gradle` and `build.gradle.kts` (for Kotlin projects).
 
-(B) {% data variables.product.prodname_dependabot %} doesn't run Maven but supports updates to `pom.xml` files.
+[2] {% data variables.product.prodname_dependabot %} doesn't run Maven but supports updates to `pom.xml` files.
 
-(C) {% data variables.product.prodname_dependabot %} doesn't run the NuGet CLI but does support most features up until version 4.8.
+[3] {% data variables.product.prodname_dependabot %} doesn't run the NuGet CLI but does support most features up until version 4.8.
 
 For package managers such as `pipenv` and `poetry`, you need to use the `pip` YAML value. For example, if you use `poetry` to manage your Python dependencies and want {% data variables.product.prodname_dependabot %} to monitor your dependency manifest file for new versions, use `package-ecosystem: "pip"` in your *dependabot.yml* file.