tools: replace invalid expression in dependabot config

tools: replace invalid expression in dependabot config · nodejs/node@7e8373b

Original file line number	Diff line number	Diff line change
`@@ -10,10 +10,9 @@ updates:`
`10`	`10`	`semver-major-days: 5`
`11`	`11`	`semver-minor-days: 5`
`12`	`12`	`semver-patch-days: 5`
`13`		`-`
`14`	`13`	`commit-message:`
`15`	`14`	`prefix: meta`
`16`		`-open-pull-requests-limit: ${{secrets.OPEN_PR_LIMIT}}`
	`15`	`+open-pull-requests-limit: 10`
`17`	`16`
`18`	`17`	`- package-ecosystem: npm`
`19`	`18`	`directory: /tools/eslint`
`@@ -25,7 +24,7 @@ updates:`
`25`	`24`	`semver-patch-days: 5`
`26`	`25`	`commit-message:`
`27`	`26`	`prefix: tools`
`28`		`-open-pull-requests-limit: ${{secrets.OPEN_PR_LIMIT}}`
	`27`	`+open-pull-requests-limit: 10`
`29`	`28`	`groups:`
`30`	`29`	`eslint:`
`31`	`30`	`applies-to: version-updates`
`@@ -42,7 +41,7 @@ updates:`
`42`	`41`	`semver-patch-days: 5`
`43`	`42`	`commit-message:`
`44`	`43`	`prefix: tools`
`45`		`-open-pull-requests-limit: ${{secrets.OPEN_PR_LIMIT}}`
	`44`	`+open-pull-requests-limit: 10`
`46`	`45`	`groups:`
`47`	`46`	`lint-md:`
`48`	`47`	`applies-to: version-updates`
`@@ -59,7 +58,7 @@ updates:`
`59`	`58`	`semver-patch-days: 5`
`60`	`59`	`commit-message:`
`61`	`60`	`prefix: tools`
`62`		`-open-pull-requests-limit: ${{secrets.OPEN_PR_LIMIT}}`
	`61`	`+open-pull-requests-limit: 10`
`63`	`62`	`groups:`
`64`	`63`	`doc:`
`65`	`64`	`applies-to: version-updates`