Rollup merge of rust-lang#105079 - nnethercote:bots-mailmap, r=jyn514

Add bots to `.mailmap`

r? `@compiler-errors`

Author: matthiaskrgr

.mailmap

@@ -73,6 +73,8 @@ Björn Steinbrink <[email protected]> <[email protected]>
 blake2-ppc <[email protected]> <blake2-ppc>
 boolean_coercion <[email protected]>
 Boris Egorov <[email protected]> <[email protected]>
+bors <[email protected]> bors[bot] <26634292+bors[bot]@users.noreply.github.com>
+bors <[email protected]> bors[bot] <bors[bot]@users.noreply.github.com>
 Braden Nelson <[email protected]>
 Brandon Sanderson <[email protected]> Brandon Sanderson <[email protected]>
 Brett Cannon <[email protected]> Brett Cannon <[email protected]>
@@ -139,6 +141,10 @@ David Ross <[email protected]>
 David Wood <[email protected]> <[email protected]>
 Deadbeef <[email protected]>
 Deadbeef <[email protected]> <[email protected]>
+dependabot[bot] <dependabot[bot]@users.noreply.github.com> <27856297+dependabot-preview[bot]@users.noreply.github.com>
+dependabot[bot] <dependabot[bot]@users.noreply.github.com> <49699333+dependabot[bot]@users.noreply.github.com>
+dependabot[bot] <dependabot[bot]@users.noreply.github.com> <dependabot-preview[bot]@users.noreply.github.com>
+dependabot[bot] <dependabot[bot]@users.noreply.github.com> <[email protected]>
 Derek Chiang <[email protected]> Derek Chiang (Enchi Jiang) <[email protected]>
 DeveloperC <[email protected]>
 Devin Ragotzy <[email protected]>